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: throwaway, people know my main. this happened yesterday. alright, so i'm at my friends house, and he's got a really hot sister about one year older than me. i do have fantasies about participating in intercourse with her. we're both over 18 if you were wondering, she's 21 i'm 20. so basically my friend has to go pick up his father, leaving just me and her in the house. turns out she's wanted the d for a while. she talks sexy and is wearing a shirt and leggings. i thought, 'this is my chance' then i remembered my friend, and how i would be betraying him, so i declined and said 'i can't *bleep* is my friend' and that was that. only once i get home i realised i fucked up and coulda banged her. goodbye fantasy.

TIFU By being a gentlemen