Nymphomaniac
Nymphomaniac starring Shia LaBeouf and Stacy Martin featured the real sex,
Love
Actors Karl Glusman and Aomi Muyock shot real sex, which director Gaspar Noe had admitted that the sex was not choreographed.
Little Ashes
In Little Ashes, Robert Pattinson had admitted to masturbating in front of the camera in order to make it realistic.
Intimacy
Intimacy featured Mark Rylance and Kerry Fox who agreed to participate in unsimulated sex scenes, such as the oral treatment
9 Songs
9 Songs featured a real intercourse between Kieran O'Brien and Margo Stilley, both penetrative and oral sex.
Wetlands
Wetlands featured Carla Juri as a hypersexual teenager who is seen engaging in several lewd sexual activities
Lie with Me
The sex scenes between Lauren Lee Smith and actor Eric Balfour in Lie with Me were actually unsimulated.
Penthouse Magazine founder Bob Guccione wanted to make a movie with unsimulated sex and it turned out to be Caligula, which stars Helen Mirren and Malcolm McDowell.
Caligula