If you can't tell how old she is when she's in bed with the guy and the mom and father walks in you haven't been watching the movie.

Lots of sex and nudity. Breasts, butts, movement.

A girl's breasts are exposed clearly and close up in a dream sequence. Guy wakes to find another girl giving him a handjob. She removes her shirt and exposes her breasts, then gives him a blowjob (head bobbing shown).

They're shown in the bath naked, her lying on top. Butt very clear.

Then lots of quick shots of them naked in various positions. Butts and breasts shown. Testicles visible briefly.

An older couple (parents?) walk in while they're in bed. Her breasts are visible. It's not totally clear how old she is at this point--young adult.

This covers first half of movie. Lots more of same in second half.