I am in 80%Used to be able to, like 25 or 30 years ago.
From a psychological standpoint, it's just masturbation....so, not gay unless, well, you're already gay.
I read a statistic in a sexual psychology book once, that claimed about 80% of straight men will TRY autofallatio at least once in their lives, but only about 10% of those can actually do it.