okay so this is a tough one.
the movie is an older one probably from the 70's or 80's. and i can only remember bits and pieces.
1) there are girls i THINK they're aliens but they look completely normal and are very busty.
2) they ( there are 2 or 3) really like sex
3) one 'rapes" guy in a lake
4) one wants to have sex with some guy, she goes under his deck and plays with his..you know.. while he is trying to work.. so she goes to the bed and plays with herself.... he doesn't like it so he comes and rapes her..
i know it isn't much to go off but it was actually a pretty interesting movie.