Lots of casual sex?

I like a guy who seems to have lots of casual sex with many women. He wanted to have sex with me too on the 2nd date itself but I never let him. He tried to make me jealous etc but nothing worked.

He was even in a pool with 5 or 6 women when he went to a female friends house with whom he hooks up with.

This guy however will pretend to be a studious and serious guy in front of me and will omit all the dirty fun he has with other women. These days however, he's been giving me these "intense looks" . On a few ocassions, while we were talking in a room alone, and I was telling him something, I caught him looking at me in a fixated way.

Whats going on with him?

I dont get it. Why does he act like a decent guy when he isn't?

Lots of casual sex?
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