What makes a "sex worthy man"?

This does NOT mean "How do I get laid?" I'm coming from an angle of respect to women in general. What's the difference between a man who just entertains you ("let's just be friends") and a man who makes you WANT him ("wow I've never felt this way before")? I know confidence is a key factor, but what other actions/principles make him worthy of your sexual desire and attention?
What makes a "sex worthy man"?
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