Most guys will tell you they like a bit of lesbian porn. There’s something hot and unthreatening about two women getting it on for you to watch. I’m not saying that all men are threatened by the sight of a penis in a porn movie but it’s certainly easier to avoid distraction if there are two girls going at it hard.
And the guys who say they don’t like it , well, most of them probably do but just feel a bit guilty about it, LOL.
Of course some men like to see a woman getting banged and put themselves in the position of the male performer enjoying the thought of making the hot girl groan and shriek with delight.