Conventional wisdom tells to refrain from physical compliments until you're getting physical - so let's suppose we're getting physical - let's suppose she's just kicked off her pants and slid off her bra; my natural instinct would be to say something cheesy like there is a god, 8th wonder of the world etc but I feel like just keeping it simple and telling her she has a beautiful body would be the best method (behind showing it)...for some reason I find myself cringing either way though.

So what's your advice for giving someone physical compliments?