Once Butch, Sandra, and her friends arrive at the beach in Cologne, he tells them as he's getting undressed, "I didn't bring a suit, so I guess I'm gonna have to go skinny dipping." Later on, when he is the only one in the water, he goes under and comes back up with his pants in his hand, asking the girls if they want to come in. Half of the girls laugh at this.
There is mild romance between Butch and Shirley in a few scenes.
Butch cheats several times throughout the film before he ends up being engaged with Sandy.
While Butch and Shirley are parked in the car, they kiss and lick each other on the neck. At one point Butch kisses and licks the part of Shirley's breast that is revealed.
Sandra's pajamas reveal most of her thighs.
Sandra kisses and talks to herself in the mirror, pretending that her reflection is Butch.
A young boy walks outside wearing a bra over his shirt.