Sort by
Relevancy

Free Stories

85%
BANGING AROUND BANGKOK
BANGING AROUND BANGKOK: THE AMOROUS ADVENTURES OF CAITLIN "MEOW" MORRISON after living and working in Thailand/SE Asia for many years i decided to write an erotic story based on some of the people i have known, venues and places i have been, and the P4P night-scene where i spent way too much... Read full Story
bkkldby 2019-06-17 14,675 first time Teen (18+) Amateur Group Sex Big Tits Cumshot Outdoor Bareback Blowjob Big Cock Asian lesbian public place
90%
On the Run
“Your first mistake was stealing hundreds of thousands of dollars from me. Your second mistake was thinking you could get away with it.” As I stood trembling before his desk, Mr. Atwater regarded me as if I were a bug on the windshield of his Lexus. “Do you have anything to say for... Read full Story
shemale lover 2012-09-01 11,753 Crossdresser Cumshot Blowjob jerking pantyhose
100%
Fender Bender
It was the first week of June and school was out for the summer, I was 18 and had just finished my Senior year. One night while we were eating dinner, My Mom and Step dad informed me that they were going away for a week. When they got married they did not go on a honeymoon so they wanted to take one... Read full Story
shemale lover 2012-07-26 8,778 Teen (18+) Fetish crossdressing
85%
My Orgasm at work
I finally found my sexual fantasy come true at work. I always fantasize about one of my female co-workers (and sometimes all of them) dominating me, pegging me, brutalizing me. That every time they walk by my office, they would pour their coffee on my floor next to my feet and i'll get on my knee... Read full Story
LovelyLeo97 2019-06-21 7,430 Teen (18+) Crossdresser Cumshot Latina Bareback Fetish Uniform Lingerie domination Sex Toys
66%
Be My Bitch
After a long day at work, I get in my car, and look forward to the long drive home. It gives me time to unwind and relax. I try to forget about the hectic office and concentrate on my beautiful girlfriend waiting at home with that warm smile that she greets me with when I get there. However, tod... Read full Story
Go Balls Deep or Go Home 2018-08-06 31,983 Crossdresser Outdoor Bareback Blowjob Big Cock Ladyboy Lingerie domination Guy Fucks Shemale Interracial Sex Toys Ass to Mouth cum in mouth
100%
Beefy Buns
It's hard to get good help. Probably, that's true in any business, but it's especially difficult to find decent employees in the fast food racket. Believe me; I've tried. I manage the local Beefy Buns franchise--burgers, fries, and shakes is our mainstay, but the menu also features fish and chick... Read full Story
shemale lover 2012-04-22 6,548 anal sex Creampie blonde shemale
50%
Feriengruss 18.07.24
Um ähnliches, wie im folgenden Bericht, mit mir zu erleben, ist es notwendig, dass man sich sehr gut kennt. Alle Handlungen sind miteinander abgesprochen und es ist beidseitig ein tiefes Vertrauen vorhanden. Nicht nur, dass mir nichts passiert, auch dass ich meine Grenzen während des Spiels klar kom... Read full Story
Cheryl_F 2024-09-03 476 anal Small Tits Amateur Cumshot Bareback Creampie Fetish blonde Big Cock Ladyboy Shemale and Girl Sex Toys small cock
50%
eromène contre vieille pétasse
Une eromène baise une vieille pétasse Lorsque je levai la tête pour découvrir à qui appartenaient ces mains de mannequin qui me servaient, j'ai été surpris de tomber sur un girly-boy. "Autre chose" sourit-t-il/elle en traînant ses longs doigts vernis incolores sur la nappe. Je n'ai pas pu m'... Read full Story
hippocampus_171 2024-11-09 200 anal Small Tits Amateur Creampie Sex Toys Mature small cock big ass sissy femboy Ass to Mouth cum in mouth teen (18+)
81%
That night....
I was extremely nervous when I pulled out my phone and dialed the number. Never before, in my wildest dreams, had I thought I would act on one of my strongest fantasies. I knew I would be nervous when I first met her, but after exchanging pictures and seeing that big, fat cock of hers, I knew I ha... Read full Story
bigTHICKY 2017-05-08 9,782 Big Tits Cumshot Latina Big Cock Ladyboy cum in mouth
50%
Eromenon vs mature whore
An eromenon for a mature whore When I looked up to see whose mannequin hands was serving my, I was surprised to find a girly-boy: ‘Something else,’ (s)he smiled, dragging his/her long, colourless varnished fingers across the tablecloth. I couldn't hold myself: ‘You've got the most beautiful ... Read full Story
hippocampus_171 2024-11-09 688 anal Crossdresser Amateur Blowjob Sex Toys Mature small cock big ass sissy femboy Ass to Mouth cum in mouth teen (18+)
100%
Fender Bender Chapter 2
The bright sun shining through the window woke me up, for a moment I was confused and disoriented. Then it all came back to me. I had sex with Mark and Susan James last night and I was still wearing a pink baby doll nighty and matching panties she had given me to put on before we went to bed. I w... Read full Story
shemale lover 2012-07-26 4,663 Teen (18+) Fetish crossdressing
90%
DISCOVERING BLACK COCK
To the greater Boston general public it was simply a small little known quite private night club located in the back part of Roxbury called The Black Rooster Bar. While in local Gay Community circles, insiders called this private by membership only pub, THE BLACK COCK CASTLE! When first learning... Read full Story
CD DIXIE IN NH 2016-05-10 10,649 Big Cock cumming sperm ebony cock
84%
First Time: How I Love Cock
The first time I ever sucked a dick was when I was around 12 years old. I was at a sleep over with a friend. We were camped out in his backyard in a tent and he started things out tentatively by asking about my luck with the ladies, which was non-existent. Then he suggested that since neither of us ... Read full Story
wickeddogg 2019-12-11 34,318 Teen (18+) Cumshot Bareback Blowjob cum in mouth
65%
Marcia Goes Back to School
Marcia was painfully nervous. She hadn't been able to eat very much in days. The upside was she was even skinnier which would make Mistress and her husband very happy. She'd always been thin and on the diet Mistress Carol had her on she was already thinner than she dreamed possible. Her anxious stom... Read full Story
shemale lover 2012-12-19 11,050 Masturbation Blowjob blonde ass fucking big boobs
100%
Exposure, Disclosure
The Greatest Liar, Exposure, Disclosure © Alexandra Rios 2019 Author’s Note: This is a continuation of the narrative which commenced with “My Awkward Phase”, which I posted here previously. Readers may wish to read that before continuing, although I have written them to stand alone. Natives s... Read full Story
the greatest liar 2019-06-18 8,217 Teen (18+) Small Tits Amateur Group Sex Latina Blowjob gangbang Guy Fucks Shemale cum in mouth
80%
How it started
What got me started off watching shemale porn was actually meeting a very beautiful shemale at a beach party. I already knew she was a guy but she was so beautiful. So at one point I asked her if she wanted to go for a walk and after a few minutes and let her know that I was down. Her response was ... Read full Story
PNPFUCKBOY 2019-02-12 12,424 Teen (18+) Small Tits Crossdresser Amateur Big Tits Outdoor Latina Bareback blonde Big Cock Ladyboy domination Guy Fucks Shemale Interracial Sex Toys Mature Homemade Ass to Mouth
100%
Sissy Boy’s Secret Desire || Part 4
The sensation was overwhelming—his body writhed beneath her as she took him deeper with each thrust, pushing him beyond anything he'd ever imagined. The strap-on filled him completely, stretching him, making him gasp for air. Each movement sent ripples of pleasure coursing through him, blending with... Read full Story
shemale_club 2024-10-01 1,356 Stockings Small Tits Crossdresser Ladyboy Uniform domination pantyhose Sex Toys sissy femboy teen (18+)
100%
Sissy Boy’s Secret Desire – Part 5
The relentless rhythm of her thrusts left him gasping for air, his body trembling uncontrollably beneath her. His mind was drowning in a sea of pure, raw sensation—each brutal movement sending shockwaves of pleasure mixed with pain through him. He couldn’t stop himself from crying out, the sounds of... Read full Story
shemale_club 2024-10-03 1,414 Stockings Small Tits Crossdresser Fetish Ladyboy Uniform domination pantyhose Sex Toys sissy femboy teen (18+)
91%
HOW MY AUNT AND SISSY NEPHEW CHANGED MY LIFE FOREVER! (fictional
It was the very first night of my month long North Carolina July summer vacation stay when my Aunt Meg suddenly entered the bedroom that I was temporarily sharing with my younger cousin Rudy. Being so openly effeminine in his body language,voice and looks, I had already planted such dirty thoughts ... Read full Story
CDDIXIE4U 2019-01-08 34,910 Teen (18+) Crossdresser Cumshot Masturbation Bareback Shemale Fucks Guy Fetish Blowjob Big Cock Ladyboy Lingerie domination Homemade Compilation cum in mouth shemale + shemale
72%
ACROSS THE STREET AND TWO DOORS DOWN by Spanky de Bautumn
Jamie knew he was different. He didn’t fit in with the other boys, but he didn’t feel like he fit in with the girls either, he just knew he was different. He wasn’t into dolls or balls. He was the smallest boy in his class and more than half the girls outweighed him. But the one thing he had going f... Read full Story
SpankydeBautumn 2021-01-29 11,866 Teen (18+) Small Tits Crossdresser Fetish Blowjob Lingerie Guy Fucks Shemale cum in mouth
100%
Karen, My School Teacher Part 5
The Bus Station By FoxyHosed I looked around, but no one was there. It was dark and pretty cold night outside. I felt the air blowing around and up my pantyhose encased legs and ass. Mmmm nice. I started walking to the bus stop a few blocks further down from the school. I felt very attractive g... Read full Story
FoxyHosed 2021-03-15 7,656 Crossdresser Cumshot Outdoor Masturbation Fetish Blowjob pantyhose legs pantyhose cd
100%
In Need of Some Sex
In Need of Some Sex By Sabrina G. Langton *** Author's Note: Hi... Just a teensy tiny story. I'm sure you know what I, um, well we like. Just a little sex in the night to make the heart grow fonder. Just two people meeting for the first time, definitely not the last. A nice intro to a new rel... Read full Story
Brina Giselle 2024-09-18 1,617 Crossdresser Blowjob pantyhose kissing transgender crossdresser with men
100%
HOW ONE PEEPING TOM MORNING TURNED ME INTO A SHEMALE SISSY BITCH
It was while cutting across his back trailer park lawn around 7pm on misty July Saturday evening, when I first discovered that Mr. Parker was really a fag. How else could you describe a man wearing a long blonde wig on his head while below he wore only a large somehow stuffed pink lacey woman's bra ... Read full Story
CDDIXIE4U 2019-01-08 14,585 Teen (18+) Crossdresser Amateur Cumshot Masturbation Blowjob Big Cock Ladyboy Lingerie domination Guy Fucks Shemale Homemade Compilation Vintage cum in mouth
85%
Whores and Pimps - Part I
Malcolm was a middle manager in a small business in a large city. Malcolm led a pretty boring life; he in his forties, single, devoted to his work, he liked to keep himself fit, all of his family lived interstate except for his older sister who lived nearby, and he led a quiet social life. Malcolm h... Read full Story
shemale lover 2012-05-13 8,506 Stockings Crossdresser Cumshot Fetish oral sex pantyhose
100%
School's Out
Steve asked me if I'd like to come to our school reunion. We were both twenty and being schoolmates seemed a long time ago. I agreed before he told me it was fancy dress. 'Your girlfriend, Sally's ok about this?' I ask dubiously. I knew Sally well, not that we got on particularly and she was ph... Read full Story
shemale lover 2012-09-03 5,336 Teen (18+) Masturbation Blowjob Uniform little cock
100%
Young Sissy Chapter 1
I don't know how long I was under...days, weeks...who knows, maybe even months. Reality blurred with nightmares as I felt my flesh being cut into by cold scalpels and stuck with needles, filling me with horribly persuasive dreams of a beautiful new body. I tried to imagine myself as a man, just to s... Read full Story
shemale lover 2013-01-04 10,650 sucking Fetish Uniform domination big boobs
100%
Lady In The House Ch. 02
A story by Michele Nylons, Part II "She's all yours Eddie. She looks beautiful." I heard Carmel say as 'she' disappeared down the corridor, her high heels clicking on the tiled floor. Eddie appeared at the door to the cell, he stepped inside and closed the door behind him. "So what do yo... Read full Story
✘Transensual✘ 2019-01-11 5,108 Stockings Crossdresser Fetish Big Cock Uniform Lingerie domination PRISON PUNK prison sex Prisonboycum Prison Bitch
100%
Couple and a Tranny
There is a saying that a single man looking for companionship and good fortune will seek someone for marriage. Lydia and I met several months ago on an online dating site. We agreed to meet at a bar restaurant for drinks and initial meeting. She was at the bar wearing a yellow sundress, white painte... Read full Story
Jon Paul 2022-09-20 5,835 Cumshot Outdoor Latina Bareback threesome Ladyboy Shemale and Girl Guy Fucks Shemale Ass to Mouth double anal
87%
Fancy dress party
Living near the coast, there are quite a few caravan/camping sites near us,Every new year me my wife and friends go out in fancy dress to one of the parks that has a great club house, Usually I go as Batman, a Centurion, things like that but last year my wife suggested we all go out dressed as Frenc... Read full Story
debbstv 2018-12-04 6,967 Stockings Crossdresser Amateur Outdoor Blowjob Uniform
100%
First fuck in public ;)
You’re only wearing a coat, I find a place where, I can kiss you then slide my hand between the flaps of your coat. I expose your breasts and slide my hand down across your tummy down to your pussy. My fingers start to explore your soft bush, working there way to your soft pink lips surrounding your... Read full Story
BalkanLoco91Ri 2019-08-26 4,286 Stockings Teen (18+) Amateur Big Tits Cumshot Outdoor Masturbation Bareback Creampie Blowjob Big Cock Uniform domination Homemade pov cum in mouth
100%
Reaching Paradise on Game Night
Reaching Paradise on Game Night by Sabrina G. Langton * Author's note: Here is one of my most popular stories. I get so many messages and emails about it and it makes me thrilled. I am so glad it has taken on a life of it's own. 'A wife learns a little too much about her crossdressing hus... Read full Story
Brina Giselle 2024-08-08 3,212 anal Stockings Crossdresser Blowjob pantyhose transgender wife dress-up
95%
Proud To Be A Sissy Chapter 8
I woke up to hear daddy lightly snoring and in my sleep I had draped a leg over him so that my body was almost covering him. I giggled to myself realizing that even in my sleep the sissy slut in me reached to grasp his flaccid penis. Then I curled closer up against daddy and contemplated about how m... Read full Story
shemale lover 2012-12-24 9,684 Teen (18+) Crossdresser Uniform Lingerie domination
85%
My Awkward Phase
My Awkward Phase ©Alexandra Rios 2019 The greatest lie is that what happens in high school doesn't matter, because life begins in college. I pretended to agree, although I never believed it, for I was the world's greatest liar. Wannabees I was hanging out with my friends Quinn, Barb and Anne ... Read full Story
the greatest liar 2019-06-14 12,464 Small Tits anal sex Latina Masturbation Bareback Creampie Blowjob Big Cock transformation gangbang Shemale and Girl Guy Fucks Shemale Sex Toys Ass to Mouth cosplay hormones high school real life situations
91%
Masturbation fantasies: Amanda, queen of the peep show
A guy visits a peep show with unexpected results. As he gets to watch a girl with something special, he discovers his hidden desires. This story contains: peep show – voyeur – gloryhole - fake tits – group masturbation – male masturbation – shemale – frottage - titfucking When William finall... Read full Story
ThatEroticWriter 2019-07-24 8,885 Big Tits Cumshot Masturbation Uniform Frottage
100%
Feriengruss 20.07.24
Erneut ging es Outdoor, dieses Mal aber an die Thur zum FKK Baden. Nicht am bekannten Platz in Bischofszell, sondern an meinen geheimen Platz, zwischen Kradolf und Bischofszell, unterhalb von Halden. Ich habe erneut mit 5 verschiedenen Herren abgemacht, die mir in gut geplantem, zeitlichem Abstand... Read full Story
Cheryl_F 2024-09-03 463 anal Small Tits Amateur Cumshot Outdoor Bareback Creampie Blowjob blonde Big Cock Ladyboy pov Ass to Mouth
69%
How i started feeling like a girl
It was early in my puberty, I was the youngest in my group of friends and many of my them were already dating and having sex with the neighborhood girls. By this time I was beginning to learn more about my body and I noticed more about girls, especially my neighbor's girlfriend, I'll call her Camila... Read full Story
Leah Peaches 2020-01-06 7,983 Teen (18+) Crossdresser solo Amateur Latina
77%
Best friend
Looking back, it seems my early teens were really a time for me sexually. Puberty had set in hard and fast and I was sexually charged. I was constantly touching myself and fantasizing about every sexual explicit act I could think of at the time. Lucky for me I had my best friend Jason. We wer... Read full Story
Veronica Trapani 2020-03-09 6,635 Teen (18+) Amateur Outdoor Blowjob Homemade cum in mouth
100%
TO BE OR NOT TO BE – PART 2
TO BE OR NOT TO BE – PART 2 by Spanky de Bautumn Part 1. Sunny, Mel, and Shari learn they are going to New York to perform a play off Broadway and are really excited about it. Being a small troupe, we unseen members had to wear many hats. Unfortunately, there was just the two of us, Joe Donn... Read full Story
SpankydeBautumn 2021-02-22 4,122 Small Tits Crossdresser Cumshot Bareback Blowjob Big Cock Lingerie Guy Fucks Shemale Interracial cum in mouth
87%
Southern Hospitality Ch. 03
XtinaSmith2017 Ash looked himself over in his bedroom mirror critically, finding himself oddly self-conscious about his looks. He had been texting Laura all throughout the day and they had agreed that dressing pretty casual would draw the least suspicion, so he had. He wore a simple patterned ... Read full Story
Gwapo67 2022-05-16 5,197 Bareback Creampie Shemale Fucks Guy Blowjob Big Cock Mature cum in mouth
100%
Highway in Heels
Highway in Heels By Sabrina G. Langton *Stories from the real world 1 This story is autobiographical. When I was 20 years old I used to drive a van for my parents from Brooklyn to Tarrytown New York once a week to drop off merchandise for retail shops in the area. I always had a full van on ... Read full Story
Brina Giselle 2023-08-28 5,337 Crossdresser blonde pantyhose kissing transgender
100%
A Religious Experience
A Religious Experience by Sabrina G. Langton *Stories from the real world 2 This story is kinda autobiographical. I was twenty-two in 1987. You couldn't just order anything you wanted on the computer, with no social interaction, and get whatever you wanted. You had to go out in the real w... Read full Story
Brina Giselle 2023-09-13 5,509 Crossdresser pantyhose transgender bisexual footjob dress
85%
Getting caught naked in public.
I always have loved the risky nature of being fully naked in places where you aren't normally. i don't want to offend some unsuspecting person while out hiking or driving on very unused roads. BUT.. at the same time, the risk is exhilarating, and the thought of being caught and the one who caught me... Read full Story
Exhibitonist 2024-07-31 8,146 Outdoor Masturbation teen (18+)
83%
Did I Do Right By Taking Money For Sex?
I first properly dressed when 14. (I did do the knickers and stockings and pantyhose thing previously from when I was 11). I first had sexual contact with a friend when we were both 14, i.e. wanked each other then I sucked him off and drank all his cum. I then waited until I was 16 for sex with... Read full Story
Linda Tiffany Vista 2024-05-07 3,504 anal Blowjob blonde Lingerie shemale fucks shemale cum in mouth teen (18+)
100%
Tilted Kilt Chapter 3
Girls Only Party I drove down to my sister Katie's house in Carlsbad on Saturday morning to spend the weekend with her and her girlfriend Brandi. I live in North Orange County so it was only an hour drive. She's 25 and I'm 24 so we grew up together and were always friends. We shared our lives and... Read full Story
shemale lover 2012-01-25 3,377 Cumshot sucking Big Cock
80%
Becoming Alanna Part 2
Walking into room number one, she told me kindly to strip nude and climb into the chair. I did as I was told and hopped in to the chair. I fit my feet and legs into the stirrups and she spread them apart exposing my cock balls and asshole. She looked me up and down and smiled "not much work wit... Read full Story
shemale lover 2012-07-12 4,181 sucking Fetish Ladyboy rimjob
100%
I Give Up
The following story is the first of four parts of a tale that explores the theme of transformation. It is thematically similar others that I have submitted but has a larger narrative arc. I hope you enjoy reading the first portion, Act One & Two. I continue to work on better editing and someone h... Read full Story
ASSEaster5678 2018-09-14 9,617 Cumshot Bareback Shemale Fucks Guy Big Cock Ladyboy
92%
Lady In The House Chapter. 01
A story by MicheleNylons ( Man in jail is transformed to prison slut.) How had it come to this? I was dressed as a woman and standing in the far corner of a darkened cell on E Block of Chelmsford Correction Facility for Men, and waiting for the most dangerous inmate in the jail. How had a mild... Read full Story
✘Transensual✘ 2019-01-11 9,901 Crossdresser Bareback Creampie Fetish blonde Big Cock Lingerie domination Guy Fucks Shemale transvestite slut PRISON FUCKBOY prison sex Prison Bitch
50%
The Chronicles of Drodge Mallea
Drodge awoke feeling fuzzy headed and stiff. Actually, "awoke" wasn't quite right -- "came to was more like it. She sat up in the lavishly furnished boudoir, stretching her athletic 6-foot frame as she did. Running a hand though her short, thick copper locks, she slipped out of the... Read full Story
shemale lover 2011-10-24 3,402 Cumshot shemale Big Cock
75%
Flowers in the Heart
Chapter 1 "Hey Scott, Fauna kind of likes you," Jenna said, snickering. "Hey Jenna, it hard to hear yourself over that echo?" Scott said as he caught the football, and then heaved it back to Ronnie. "Huh?" Jenna asked, puzzled. "Yeah, your head up your ... Read full Story
shemale lover 2012-11-11 10,859 anal tranny Cumshot oral
94%
Taken Chapter 1
Georgia pulled her Mercedes out of the gas station in Albuquerque back onto interstate 40 heading east. It was a long drive ahead to Chicago. She hated traveling alone, that was for sure, but the move to the office back east made it necessary. It was either drive there or sell her Mercedes and buy a... Read full Story
shemale lover 2013-01-18 7,586 Cumshot Big Cock ass licking big boobs ass fingering
80%
The Farm
“See you Sunday, baby,” said Marcus Jenkins to his wife, Tasha. “Alright! Have a good day at work,” the wireless phone company retail store manager smiled. “Love you, Kobe! Love you, Tiara,” the wastewater plant operator said to his offspring. “Love you, too, daddy,” the youngsters rang out in un... Read full Story
Faggyboi and Puzziboi 2021-12-08 6,115 Teen (18+) gangbang Guy Fucks Shemale sissy femboy Ass to Mouth
100%
From a 50's virgin to a Mature good for all
***Prologue - Confessions: Every day since I offered my virginity, I put myself in the shoes of a woman. The little town where I live forbids me to show myself socially. However I made myself an accomplice, my epilator who receives me after closing. Since my new beginning, male masturbations are not... Read full Story
hippocampus_171 2023-01-11 4,795 Stockings Crossdresser Amateur Group Sex threesome Big Cock domination Mature foursome Homemade cum in mouth shemale + shemale milfs
93%
The Babysitter Chapter Two
Over the next few weeks, I could hardly think of anything but the idea of wearing girly clothes and how sexy it would feel. Every house I babysat at now, I would not just go through the underwear, I would dress up in it. I began to build up quite a collection of soiled panties stolen from the women ... Read full Story
shemale lover 2016-03-06 18,004 tranny Teen (18+) jerking off
75%
Story for adults Part 4
Alice's place in the household proven to be quite complicated and very demanding. First and foremost she was Mistress Angela's slave and her needs came first. Pleasing and servicing Mistress Angela and Mistress Janice both sexually and otherwise took up a great deal of her time. Her life acquired a ... Read full Story
shemale lover 2011-12-20 4,687 bondage and discipline heavy feet reluctant
80%
Permanent Stay in Mastersville Part 3
When I woke up I felt incredibly weak and when I tried to move I found out that I was restrained in some way. Realizing this I became wide-awake in an instant. I remembered that it hadn't all just been a bad dream. I really had been caught and enslaved. I tried sitting up in bed, but was help down b... Read full Story
shemale lover 2012-01-08 4,539 toys bondage and discipline heavy reluctant
100%
Josephine's First Day
My life at school was fairly uneventful. I wasn't brilliant academically. I wasn't a talented sportsman, actor or musician. I wasn't one of the popular children. I wasn't in physical fear from bullying, although there was a lot of teasing, name calling and 'jokes' that were funny for everyone else. ... Read full Story
shemale lover 2013-01-04 9,261 Teen (18+) Crossdresser sucking Uniform handjob