Naked Dave runs in front of a van fully nude.
We see a man run into view butt naked in the middle of the night, very breif. We see his back side.
A man is shown receiving a handjob in the background during a party scene, but it is brief and hard to see unless you look closely. Many viewers will miss it.
We see Brandon Dicamillo with his buttocks sticking out of his pants. He turns around and laughs at the camera and pulls his pants back up
Nowhere near as much sex & nudity as the other CKY movies.