I see a lot of these not getting a response so I hope I can describe this well enough to job someone's memory. This scene was the first naughty thing I ever saw and as time passed I realized it was not the norm.
I saw it on unlocked satellite TV in the mid to late 80s. To the best of my memory, it was a white guy having sex with a white woman in doggy position with the camera facing her face. Off to the side was a black man playing the role of a baby with a pacifier and diaper. I think they were supposed to be his parents and he was witnessing this scene. It makes more sense for the black guy to be having sex with her while the white guy looks on so maybe I misremembered but that's what I've considered it to be for many years.

Like a lot of people on here, I was impressed by that first scene and have looked for it through the years.

Thanks!