The entire “chicks are into chocolate, Harry” conversation, Bob and Harry had in Storm Front when Harry made the love potion. I especially like this part:
Bob - "Now, just a teaspoon of powdered diamond, and we're done."
Harry - "Diamond. I don't have any diamonds, Bob."
Bob - "I figured. You're cheap, that's why women don't like you. Look, just tear up a fifty into real little pieces and put that in there."
Harry - "A fifty-dollar bill?" I demanded.
Bob - "Money," Bob opined, "Very sexy."
It’s not just funny. It’s a great character introduction as well.