I can't imagine words that are much more of a turnoff.
Fuck my ass, fine. Fuck my pussy, fine. Fuck my cunt, fine. Don't try too hard by combining them. 'Fuck my asspussy' -wtf? Is that a pussy with shit in it? Are you too afraid to refer to your fuckhole as a pussy because you're worried about being a woman? Are you too afraid that asses don't get fucked because you're worried about how manly you are? And now I'm too busy wondering what's wrong with you in which direction and why you're making up weird word combinations to think of you in a sexual context, game's over, play again later.
But as always, up to the individual.