Sexcula (1974)

A woman lies completely naked on her stomach. Her breasts and profile of her butt are visible but nothing too explicit is shown.

An explicit sex scene takes place in close-up detail. This scene lasts several minutes and in most cases the shadows and angles eliminate any explicit detail, however the scene includes full front female nudity, full frontal male nudity, unsimulated Fellatio, unsimulated Cunnilingus, unsimulated penetration, and an orgasm is implied but not shown.