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: backstory: i have a really close girl friend. she happens to be dating a boy who i had previously had some drunken hookups with.

today: girl friend and i went to a movie and were just blabbering on the way back in the car, and somehow got on the topic of anal sex. don't remember the conversation that led to that point, or even the sentence i was responding to. but the thing that i said will forever be burned into my memory as the most poorly worded, unintentionally hurtful thing i've ever said to a friend: "i'm not into butt stuff. the only person i've ever even tried that with is your boyfriend."

she already knew about me hooking up with him before they were dating, and agrees that it's not important and nothing to be upset about. she knew the details of the encounter. if i had called him by name in the comment, we could have both laughed it off, even, because it would have been an interesting observation of fact. but, because i'm a dumbass and don't know how to maintain friendships, i called him "your boyfriend." with my poor word choice, i made it about her and made it offensive. i immediately felt awful about saying it, even before i finished the sentence, and i just couldn't stop myself saying it.

she texted me after i had gotten home from dropping her off and said "it was kinda fucked up what you said. i don't think i'm being too sensitive by thinking that."

i responded, agreeing, and with a sincere apology, and she said already forgave me, but i still feel like absolute shit.

TIFU and said something really fucked-up. [NSFW?]