Oz: All right, here's a new idea for you, Stifler, okay? You find a girl. You two become best friends. And you don't bother counting how many times you have sex with each other. You just laugh at the people that do count.
Stifler: Here's a new idea for you. I'll get you a spoon so you can eat my ass.
[Both sets of parents have walked in on Jim and Natalie having sex.]
Jim's Dad: [to Natalie's Dad.] Hi, I'm Jim's Dad. You must be the parents of this young lady. I didn't get your daughter's name, but I'm pretty sure my son did.
Stifler: Jim. Can't you keep your shirt on? You're scaring the chicks away.
Chosen answer: Yes. That's the point of the theory. Men multiply the number of women they've had sex with by 3, women divide the number by 3.
Captain Defenestrator