Porn is an interesting thing. There are three factors that when included in a porn clip, will turn me on more than any other. Reality/enthusiasm, one or both of the people making noise, and anal penetration.
Found a gay clip recently where the top is so clearly into the bottom's ass, playing with it, biting his cheeks, slipping fingers inside. He already sounded worked up by the time penetration happened. Never heard a peep out of the bottom, although his hard cock and balls were in a cock ring and pulled back between his legs to be visible.
The top was so vocal when he came, quite loud and authentic. He was all over that ass!
So fucking hot.
Definitely sent me over the edge, laying there in my bed with my phone and earphones connected...watching porn.