Bound(1996)
The lesbian scenes between Gina Gershon and Jennifer Tilly are really sexy,especially the uncut version.
Cruel Intentions for the kiss between Sarah Michelle Gellar and Selma Blair - Ok not a full on sex scene bit soooooo hot!
Shoot 'Em Up(2007)
Monica Bellucci in a wild sex scene during a gun fight???
Not the most erotic she's ever done but,she always looks fantastic.
Betty Blue(1986)
Beatrice Dalle spends most of the film nude and the sex scenes are still pretty hot.
Desert Hearts(1985)
Patrica Charbonneau and Helen Shaver have a pretty good session in a hotel room.Considered a groundbreaking film in 1985 as it phocused on a lesbian relationship,not seen often in this era.
The Brown Bunny(2003)
The film is utter crap aside from the famous sex between the pretty Chloe Sevigny and her then husband Vincent Gallo,it caused a big fuss because you see her perform oral sex on him.
Saw mad dog and glory. And that Uma Thurman sex scene was amazing. She had fantastic pair of tits