Who needs to see actual human bodies fucking when you can get the best part, the cock going into the hole. You're so close it's like you're doing it yourself.
That's the benefit of filming a movie like this, it engages the viewer in the participant's experience. Well, not really, since the viewer is still at home with his dick in his hand, but at least it's that much easier for him to think that it's slipping in and out of an asshole rather than Rosy Palm and Her Five Sisters. The drawback is, of course, you can't see who they hell you're fucking, which is kind of like the backroom of The Cock on Saturday night, and we sure have had some fun times there, so it's not the worst thing in the world.
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·Fucking Me on the Edge of the Bed (xtube.com)