S01E06
-Leonard: This party is my first chance for Penny to see me in the context of her social group, and... and I need you not to embarrass me tonight.
-Sheldon: What exactly do you mean by "embarrass you"?
-Leonard: For example, tonight, no one needs to know that my middle name is Leakey.
-Sheldon: But there's nothing embarrassing about that.Your father worked with Louis Leakey, a great anthropologist. Had nothing to do with your bed-wetting.
-Leonard: All I'm saying is that this party is the perfect opportunity for Penny to see me as a member of her peer group, a potential close friend, and perhaps more. And I don't want to look like a dork.