Jay: "This sucks balls, man. How come we ain't gettin' no rides?"
Hitchhiker (George Carlin): "'Cause you're doing it all wrong. You gotta give the driver a little incentive."
Jay: "Like how?"
Hitchhiker: "Like this. (Holds up a sign that says 'Will give head for ride.')"
Jay: "Yeah, but what happens when they pick you up and you don't make with the head. Don't they kick your ass to the curb?"
Hitchhiker: "Sure, if you don't make with the head."