My SO isn't being supportive.

He is actually kind of being an a**hole. I am 37 weeks and we were talking about L&D and I reminded him that I wanted to have a natural birth birth. He then stated "Why can't you just get a c-section?" I was shocked but out of curiosity I ask him why he said that. He then goes on to say "I don't want my p*ssy to be ruined."
I told him to f*ck off and rode the rest of the way in silence.
I just don't understand. I mean 1. It's my body so how does he think he can call it "his p*ssy". 2. A C-section is major abdominal surgery it's not like a quick thing that you recover from in like 20mins. 
Anyway, now I'm starting to doubt myself. I'm a first time mom and I want to know do things go back to normal visual down there. I know the vagina is muscle so tightening isn't what I'm worried about. It's just like ugh why did he have to say that.