Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: i live in a flat with my long term girlfriend, and my roommate. we barely know the guy, and he's probably our 4th roommate now. we've lived with close friends before but it never works out like you think it will so we decided to help out someone we briefly met a few times. we smoke in the house and usually have friends over in the living room. our roommate zack is a chronic stoner, and usually pretty docile, just keeping to himself, sitting on the couch in the living room playing gta or watching the game.

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one day i was having sex and just couldn't cum. just one of those days when your dick won't cooperate. my girlfriend decided to give me head, and i came in her mouth. after the faucet stopped she didn't want to swallow so she spat it out in the closest thing to us that could hold. she had to either run naked to the bathroom or spit it out in the ashtray. she chose the latter. it happened to be a pretty full ashtray with several cigarette butts in it. it was pretty gross looking, like paper mache on top of an eiffel tower art project made from cigarette butts. i looked at it one last time before putting it under the bed. we went to bed shortly after. biggest mistake was that i didn't clean it out right away, i sort of forgot about it. well the jizz became like glue to the cigarette ashy dirt and butts, and formed like a black snowball of dirty shit in the ashtray. after work i tend to play some games on my free time while having a cigarette and one day while i'm in a game that needs full attention at every moment, league of legends, i had a knock on my room door.

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i answered the door hastily so i wouldn't screw up the game, and it was zack. he was really baked and ran out of cigarettes and asked if he could have one. i was all out and said sorry and closed the door. i ran back to the game, and another knock came from the door. i answered and it was zack asking for my ashtray. he wanted to roll a cigarette from the discarded leftover tobacco from the butts. i look around the room and noticed the full, and long forgotten ash tray and without even thinking i handed it over to him. zack returned to the couch in the living room with our friends, and i went back to my game- which we've no doubtfully lost at this point.

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my friend sitting beside zack watched as he unraveled the tobacco from the discarded cigarettes. he noticed the dried paper mache ball of butts, and my friend commented something along the lines of "sick, don't use those ones." zack replied "nah, they just have water on them." he clearly wasn't picky or in extreme desperation for a cigarette. it didn't dawn on me until much later when my girlfriend returned from work and asked where the ash tray was. i told her i handed it to zack because he wanted to make butt-smokes, which was not unusual for him, and i watched as her face went from super-embarrassed, feeling bad, and holding back a big laugh, to that hooooly shit face, all in the same moment. it was that face that you only see once in a life time. that face you make when you realize someone had pulled apart your jizz-drenched smoke butts and smoked your baby gravy. she ran into the living room to see the guys still watching tv. the butts were on a plate on the coffee table-fully picked apart and empty, including the jizz soaked ones. the ash tray was butt-free except for the ashy dust.

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i never told him what happened, and i never meant to be a dick. it was like i pulled an awful college prank, or something but i was only trying to help him in his time of need. i felt so fucking bad. i'd never make my worst enemy smoke my jizz... especially not my friend/roommate. my friends told him what happened eventually, and he just shrugged his shoulders. there's not much you can reply with to a comment like that. he's no longer our roommate but that's another story.

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edit 1: sorry, didn't realize i wrote this much.

TIFU by (sort of) ejaculating in an ash tray. NSFW