I Met This Guy Online And Everytime We Talk On The Phone He Wants Phone Sex?

I joined this dating web site and im talking to this guy. And he seems really nice and everything. When we first talked on the phone he was really nice and easy to talk to. But the other night we were talking on the phone and he wanted to have phone sex and he wanted to again this moring we live 2 hours away from each other. Is he useing me just for sex or is it normal?