So i'm really a bad person because I don't want kids?

I don't want any. And everyone in my life is so mad at me for it. Everyone in my life also thinks I'm stupid so why in the heck would they want a stupid person having a kid?? DUH! Even the most liberal guy I know was like, "well it's a really good thing to pass on your genetics". Actually I'm really ugly so no, it's NOT a good idea. Iand he said to me"You just don't wanna give birth! Because you're selfish and don't want your body to stretch out!!". Quite frankly, yes. I DON'T want to ruin my stomache, or my vagina for that matter. OR MY LIFE. Why is that so hard to accept. Also I feel like everyone wants me to marry a man, but I can marry one because if I did, then I'd have to have sex with one, and that's NOT GOOD> Why in the heck does everyone think it's my duty as a woman, to satisfy a man's lust and over populate the planet? Am I right???