George: Oh, those birthdays. I told you. They're relationship killers. If a relationship is having any problems whatsoever, a birthday will always bring it out.
Jerry: I never should have made up those rules.
George: What is it about sex that just disrupts everything? Is it the touching? Is it the nudity?
Jerry: It can't be the nudity. I never got into these terrible fights and misunderstandings when I was changing before gym class.