When a guy with a huge dick pulls away while his girl is on her knees blowing him and he starts swinging his big prized cock across her head, just like a prehistoric caveman would whack his woman on her head with his caveman club.
Girl: I hear you're great in bed
Guy: This is true, my room is the G-spot, call me Mr. Flintstone, I can make your bedrock.
Girl: Let's fuck....right now