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: this fu did not happen recently. in fact, it happened about 3 years ago. it's still one of the most embarrassing moments of my life.

i should preface this by saying that i'm a 23 year old male, and when i was younger i was going through a bit of an experimental phase. i just wanted to see what things were like with other guys, and i wanted to try different things. i was in the peak of this phase when this whole situation occurred. my best friend had invited me to a new year's eve party at another friend's house and told me that there would be alcohol. being the young adult i was, i was immediately into it. we get there, the party's in full swing, so i decide to separate from my friend and do my own thing. i'm a social guy, so it's not hard for me to make friends or anything like that. after a few minutes, i spot this really cute guy making eyes at me, and i realise he's exactly my type. short, blond, kind of nerdy-looking, and basically a twink. don't ask me why i'm into smaller guys. i just am. i walk over to him and start chatting him up and he tells me his name is cameron, and it turned out that we had a lot in common. at this point, i'm really into him and i kinda just want to get closer to him. after about two hours and more than a few beers later, we're both slam dunk drunk and have already crossed a few personal boundaries. he ends up confessing to me that he's gay, as if i didn't already know. before we know it, everyone is counting down to midnight and we just sort of look at each other and i kiss him as everyone is cheering and hollering. it was incredibly romantic, and i still regard that moment fondly.

but that's not when the fuckup occurred.

no, reddit. this particular fuckup occurred about 30 minutes later, when we were back in my apartment, making out and getting each other undressed in the dark. he stands on his tip-toes to kiss my neck and i swear i felt like my dick was about to burst straight out of my jeans. he pushes me down on the bed and pulls my jeans off before getting on top of me and putting my dick inside of him. he starts riding me and we're both enjoying it. then, all of a sudden, something feels wrong. he looks at me strange and stops moving and asks me what's wrong. i give him a quizzical look and ask him what he means. turns out i had gone flaccid mid-coitus. my face turned beet red and i could see him trying to put the pieces together. apparently i completely lose the ability to maintain a boner when i'm drunk, but he assumed it was because i didn't find him attractive, so he started crying. i put my underwear back on and ended up spending the rest of the night trying to console him and explain that it was the alcohol. we ended up falling asleep somewhere through all that, and i woke up the next morning to find him gone. he never spoke to me after that.

TIFU by not being able to have sex with a guy [NSFW]