Is it main-stream for my man to do this stuff in bed? (Explicit)?

My Fiance is 20 years old and we use to have a pretty normal sex life until we were together longer. I am not comfortable with do this stuff. He wants me do him a strap-on. He likes to swallow his own ejaculation. He has told me he wants to pee on me in the shower. He also likes for me to use my mouth and fingers on his back door. Please spare the "he's gay" comments, I know he's not. But in this day in age is this stuff common to do? Or am I just being up tight?