It sounds like he could use some therapy. He probably was abused himself and doesn't know appropriate sexual behavior, just the fact that you are pregnant and he wants to have multiple partners is a sign of somethings not right. Just because you don't think he should expose himself to an eight year old little girl, doesn't mean you think that all men are rapists. He's just trying to make you feel like the freak, he's being defensive. He sounds like a mess, I'd get myself out of that situation if I could.

Good luck!