Some men think out loud. Then when brought to the realization that their significant other can think the same thing they freak. I wouldn't worry too much about it. Just make it clear that whatever he fantasizes about you have the right to fantasize about as well.

You should leave. Now. ASAP.

Run.

Let's hope he wasn't thinking things through, and was just joking.

dump him..then he might find out what its like to sleep with other girls.

Get out OP, now. That sort of double standard and poor treatment is only a sign of things to come!

RUN. 1) if he thinks it is ok for him to sleep with someone else but not you, chances are he has/will. 2) if he looks at woman like that, and sees you as a piece of property, he does not respect you. That can just be a lack of respect, which is a problem on its own, but it can also lead down the road to abuse.

Run.

Atleast he thinks of you better

now you know what kind of a boyfriend you got...