In this task, you are given a Reddit post as a text. Your task is to generate a short summary for this text. The summary must include a situation which caused humor. The summary should be one or two sentences long.
Q: Text: this major fucked-up took place about three hours ago. i and my girlfriend, let's call her mandy decided to sleepover at her place, it was good idea since her parents and sister wasn't home, well i was wrong all along but let's jump to that later on. so after like hour of travelling i finally arrived at her door, she opened, we hugged and had some girlo-boyish time together by watching a movie together and playing around with each other. now after the movie is coming the major fuck-up and i mean big as fuck, bigger than arnold schwarzenegger and vin diesel combined together. it came that moment when mandy become so clingy and was so horny so we ended up having sex. it was my first time and i was very nervous and it's the reason why i fucked-up so badly. after we performed 69 when she was on top, it was so thrilling and good in the same time that i shit you not, i shit myself and after like 3 minutes it started to stink and she asked me if i done something and i said no as i didn't feel anything by that time then we both stopped and as i stand-up it was finally reviled that i truly and unintentionally shit myself during sex, she looked down and made that smirk expression on her face and laughingly told me to clean it, i was so embarrassed that my whole face was soo red. i was just glad that she was cool with it and it was her bed instead of her parents. after i cleaned it we went sleep together but didn't had sex afterwards anymore.

p.s sorry for my poor english.
A: 
had sex first time, shit myself during ass-riding.