Taraji P. Henson of Empire and Hustle & Flow fame seen having hard sex with a guy – riding him and doing it from behind, all while nude.

Kristanna Loken - BloodRayne

Alexandra Daddario - Lost Girls and Love Hotels http://www.imdb.com/name/nm1275259/

Kate Groombridge emerging naked from a pool of water, first showing her breasts and then offering a nice view of her bare ass when she walks over to a guy who is standing on shore and embraces him.

Sigourney Weaver standing in a bathroom topless, showing her right breast first when she lays a towel over a rack and then talking to a guy for a while, her breasts not quite reflected in the mirror...

Julianne Nicholson making out with a guy as he helps her undress, her undergarments coming off to expose her left breast before she presses it against him as she moves in to kiss him some more...