If you're post op, and he's already seen your face, what in the world are you worrying about? If he already knows, he clearly doesn't mind. I personally wouldn't bother driving the point home; It can very quickly become the crux of any relationship (or conversation, which is as terrible a loss). And while I wouldn't for the life of me sleep with such a man (much less a bodybuilder), I'd go for in an instant.