Woman sunbathes topless on a boat. Two guys spy on her with binoculars.
Woman undresses and takes a shower. Breasts and butt seen.
Slightly older woman seduces 18-year-old (actor probably older) and they engage in sex. Bare breasts and bare chest are all that is seen.
Man and woman engage in sex on a boat. Bare breasts and bare chest are all that is shown.
There are sex scenes where the couple makes out and are shown in bed, but nothing explicit.