Ross: Anyway, it wouldn’t matter because I’m a teacher and she’s…she’s a student.

Chandler: Is that against the rules?

Ross: No, but it is frowned upon. Besides, 10 years is a big age difference.

Joey: Well, think about it…when you’re 90–

Ross: I know, I know. When I’m 90 she’ll be like 80 and it won’t seem like such a big difference.

Joey: No…thats not what I was going to say at all. What I was going to say is that when you’re 90, you’ll still have the memory of what it was like being with a 20 year old.

-Friends, “The One Where Ross Dates a Student”