Why does he stay on top of me for a few minutes and stare after sex?

I’ve been dating a guy for a few months and after sex he will lay on top of me exhausted but then will continue to linger on top of me (and inside me) and will stare at me, smile and kiss me. He has told me he finds me the prettiest when I look content. Do guys do this often with most women or with women they love?

Why does he stay on top of me for a few minutes and stare after sex?
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