Well… as I was saying with MrDibble I don’t think it’s so absolute when the act in question is simply going on a date rather than actual sex. I think, under no circumstance is it morally wrong to refuse sex. (I could imagine contrived situations like you are the last couple alive but for all intents and purposes…) But there are situations where I think it would be morally wrong to refuse a date, even if you find them unattractive. Of course it isn’t fair to the date, but there may be other counterfactors in play. You might ‘owe’ someone, it might be a double date, etc. The motivation for your refusing is important because you do not have the absolute moral right to refuse.
I’m primarily concerned with the question of whether the preference is, itself, a form of bigotry.
~Max