Pinocchio and his girlfriend were having problems. Every time they would do it, she would complain about splinters, so Pinocchio went to Gepetto about the problem.

Gepetto told Pinocchio to go to the hardware store and buy some sandpaper to sand off the splinters before he had sex with his girlfriend.

A week later, Gepetto asked Pinocchio, "So how's it going with your girlfriend?"
Pinocchio said, "Who needs a girlfriend?"