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: my roommate's name is brennan, and we both have the same type of razor. this morning, after i finished shaving, i noticed a "b" written on the razor in sharpie. "shit!" i thought, "this 'b' must mean that this is brennan's razor."later, i apologized to brennan for accidentally using his razor. "we have the same razor," said brennan. "i just always use them interchangeably." "doesn't the 'b' stand for brennan?" i asked. it stood for balls.

Tifu by using my roommate's razor.