Why do people say porn is natural/normal?

Idk but i think it's kind of a lame excuse? Go to any psychologist and they will tell you otherwise.

If you and your partner have no problem with it and have a healthy realtionship then that is fine, great for you.

But for me? Umm no thank you. It bothers me that SO watches it because its women that are basically NOT real, not real sex its all fantasy. So it bothers me he probably has that expectation in real life. And yes i am self concious especially because i am pregnant and i don't look like those girls. BUT my problem is that why can't do something so simple? It's not that fucking hard. The thought of my man getting turned on by another girl that looks NOTHING like me physically kills me. And more because it seems like no matter how much it bothers me and he knows it, he doesn't stop. I think a person should respect whatever bothers the other and more so once agreed to respect it. Porn is ruining my sex life. We have not had sex in a month and he just told me today he watched it a few days ago, so now i do not want sex at all. Its either porn or sex. This is a rant and vent as well. Took it all out in the best way i can explain it. Please i don't want comments as to im overreacting because I'm not, if something makes me uncomfortable even though i've tried to go with it then it should be respected by my SO, so no i am not overreacting. And i am posting this anonymously because i post a lot on here and don't want anyone to know it's me.