Head and Shoulders

There's this blond and this brunette. And they're in an elevator. And this hot guy walks into the elevator, and the women are like "Woo-hoo, that guy is fine" and "Mmm...he's got a nice butt", and stuff like that. Then they notice that he has dandruff. When he gets off of the elevator, the women burst out laughing. The brunette, giggles and says: "Oh, man, someone should give him head and shoulders." And the blond, confused, says: "Really? Well, how do you give someone shoulders?"