Juvenile boys go swimming in the nude. While the scene is innocent in that there is nothing sexual that occurs, these boys are most likely 8-10 years old. At least one boy faces the camera with his penis in full view. Another scene shows an obscured view underwater.
Man rubs on his girlfriends thigh while he is driving. She is wearing a skirt and his hands move pretty far up, however, they never reach her genitals.
Young boys swimming completely nude. Penises are shown, however the scene is very innocent and "natural". Absolutely nothing sexual implied in this scene.