In The Barcelona Sex Project, three men and three women reveal their secret selves, masturbating to orgasm on camera. Their scenes are shot in a bare white studio with beds, chairs or beanbags to make them comfortable. The film also includes interviews with the performers and they talk about their sexuality and what turns them on.
This film is by Spanish director Erika Lust. It won her several awards.
You’ll find the whole film at Lust Cinema