Mouthpiece (2018)

There are several scenes of female nudity while bathing or changing (i.e. bare breasts and buttocks). There is also a brief scene of male nudity from the side - his penis clearly visible. There is a scene of sexual intercourse which lasts for over a minute while another character watches. We see some thrusting and the woman's bare breasts and buttocks. There is a scene of masturbation under the cover sheets - it is easy to miss.