Sure, he does have his own set of shafts and balls, but it's almost impossible for him, not to mention for most men to be able to reach his own dick and suck it. Sucking dick is probably one of the most satisfying things a gay man can do. Suck another man's dick, spread his ass, put your dick inside his butthole, it doesn't matter! Just make sure that you'll return the favor to him once you're done with your turn.
But as long as you don't hurt anybody when pursuing your happiness, then there's nothing wrong with that at all. There are still a lot of people who think that being gay is a sin. Don't think that just because you're gay doesn't mean you shouldn't seek to be sexually satisfied.
