Bad Manners (1984)

As the characters are climbing on a fence, Piper (Georg Olden)'s pants fall down. He is seen wearing a pair of red and black briefs before embarrassedly pulling his pants back up.

A young woman removes her bathrobe and steps into the shower, where she is ambushed by a child with a camera who takes a naked picture of her. Brief full frontal and rear nudity from the woman.