He is a total hypocrite. Personally, I don't care if a girl I'm dating sees other naked guys, in person or on screen. I have zero jealousy. But don't most women get much more excited by the written word - i.e. romance novels - reading about the dapper Reginald and his illicit tryst with a low-ranking but very comely scullery maid?
I'm glad you're mature enough to stop comparing yourself physically with the "sluts" in porn. For a man, watching porn is like you going shoe shopping. To sum it up in one word: variety. Ohh, those Jimmy Choos are cute, but wait I've never seen those Manolos before! I wanna buy them all! You get the idea?