In. His. Mind he hasn't sucked a guy's cock. With the guy wearing it and I'll be honest, I don't think I've ever seen a guy in gay porn giving a blowjob with a condom, RIGHT back to vintage gay porn, he's able to kid himself. It's no different than sucking on a dildo, he says to himself.
I used to think it was bad when you'd see these guys technically have a cock in their mouths, but their lips weren't sealed and you just know their tongues weren't in play.
If you're going to give a blowjob, then give one. No one was asking him to swallow or even take a load on his tongue or his face, but unless he also makes women wear female condoms for cunnilingus, then he's making a statement about oral sex with just men.