That’s not too unusual for a lot of “straight” guys or for men in general. A lot of men find it much easier to get hard by themselves than when someone else is there. It can indeed be a reflective of some type of queerness or “quirks” in your dimensions. I’m in the pansexual spectrum, and I tend to get harder quicker for chicks, though I have more male passions and am definitely gay-leaning when it comes to the sexual, romantic, emotion, commitment spectrum. It can also be a sign of being more turned on by paraphiliacs or situations than actual people, or some type of traumas that make it difficult to perform with people, or degrees of fluidity and contradictions. He could also have been a basic homosexual. There’s a lot of different things that could be going on.
While growing up I definitely wanked off to this dude quite a few times. Looking back, he wasn’t that hot and was kinda cringe. But considering how so many of these guys nowadays just sit back silent and wank off, at least he was verbal and put on a bit of a show. And he did have a nice dick. Also appreciate that he never got messy or problematic online and never tried to desperately “crossover” into hetero porn and female approval while ignoring his gay following.