its not the same. liking pussy in the sense of fucking it is one thing, licking it for hours is another. liking ass on a girl is one thing, having your tongue up it is another.
but with your logic, a man cant love a girls ass, unless he licks it.
An ass is not gender exclusive, so I can see a dude having an issue with it. plus poop comes out of it.
Myself, i will lick a bitches asshole until my tongue bleeds. BUT...it's gotta be a pretty one, same with the poontang. I'm not into a smelly, nasty roast beef snatch just as much as the next guy.
Maybe that's the real issue here, you need to up your game and pull some top shelf ass.