Suspicious Minds (1997)

The opening scene shows an extreme close-up of two people having sex. All you see is the middle of their bodies moving back and forth. Her breasts are visible for a second. The entire scene is shown as if you're looking at a television from a few inches away--black and white (actually blue) and very very grainy.

A couple is shown having an affair while a PI video tapes them. He removes her clothes and her full profile is visible, with her hair covering her breasts.

A couple is shown having sex. It is very dark but her breasts are clearly exposed at times. Most of the shots are shoulders and up.

A couple has sex while she is wearing a shirt.