My ex-wife and I lived in a small town - no porn shop- and if we had one and you stopped everybody would see your car there or tell others if they saw you going in there. (Mind you they'd see you whilst "passing by" of course). So we went out of town and saw a random porn store and stopped on a lark for a DVD to take home. She stayed in the car and bravely sent me inside.
The second I opened the door I saw a poster of a white man who had a cock hanging almost to his knees. As I stepped inside the darker it got and in the back was pitch black. I don't know anyone saw anything back there. I decided to get the hell out but to play it cool I paid like $30 for an old used DVD which I figure were just out there as a front.
Not only am I straight but I am not going in a room where I literally can't see a damn thing. Could end up arrested or with a cock up the ass and I had no interest in either.But I'm 99.9% sure sex acts were on the menu back there with random people in the pitch dark.
You'll see pics big dicks in straight establishments, not just in the pornos. LOL.
I went to piss at an outhouse where rednecks drink beer. Inside there was a pic like you described: white man who had a cock hanging to his knees. Only difference: he was faceless (just his lower body). I would have expected a hot pussy or titties to look at.