That's a tough one,... as a man, maybe I can help you to be a little more understanding as to why he feels the way he does,... most of us are mechanically geared this way, we are by design a more physical being, whereas a woman is more of an emotional being, hence the larger bone structure more muscular builds, stern features, naturally aggressive survivalistic nature ect, ect. I long for and sincerely need a woman's touch like an unquenchable drug, it is how and why we were naturally designed, pro creation drivin life forms, for a man it's a number of things all bundled up into one. Sex for a man is a sense of well being, acceptance, confidence, closeness, bonding, the very glue that binds, hell it's like hitting the lottery every time we do it so I can understand where this would be a difficult time for him. Rather then just telling him "No that is disgusting and I won't do it simply to pleasure you", you need to establish some type of common ground, not sure how to do this but if you don't do it in a reasonable amount of time he may start seeking a replacement, not trying to be rude or disrespectful with that statement but its the scary truth.