I don't have personal experience with SA, nor am I homophobic. I'm pansexual myself. It isn't at all a false equivalence to say that there's a real difference in insult between telling someone to give you a haircut and telling someone to suck your dick. They are both services, but the latter draws stigma from historical sexism and homophobia. Using dicksucking as an insult affirms that history of bigotry, when in reality we should be fighting the negative stigma surrounding sexuality from women and gay men.