Quote from Joey in The One Where Ross Dates a Student
Ross: Anyway, it wouldn't matter, okay? Because I'm a teacher. She's a student. Chandler: Oh, is that against the rules? Ross: No, but it is frowned upon. Besides, there's a big age difference. Joey: Well, think about it like this. When you're 90- Ross: I know, when I'm 90, she'll be like 80 and it won't seem like such a big difference. Joey: No, that's not what I was gonna say at all. What I was going to say was when you're 90, you'll still have the memory of what it was like to be with a 20-year-old.