Why is he acting like this?

I know a lot of guys who are like that and all of them are different. Some try to impress girls and act all 'manly' wanting action, when they're not like that at all. Some just wanna get it in, to be blunt. Others may be into ual stuff, but they realize it makes you uncomfortable and are okay without it. It depends on the guy. Get to know him better, and if you don't like where it's going, get out of the situation. good luck! :)