"I am not having kids", is my thought at this point in life.
1) I have an underdeveloped maternal instinct. Not nonexistent, just severely stunted. So no real drive to have children.
2) Pain. No further explanation needed.
3) What happens if you have kids and you don't like them? They're people, and if you just plain don't like them?
4) 18+ years of total responsibility.
5) I'm on medications for my arthritis that I would have to be off of for a minimum of six months before even *trying* to concieve, remain off them for the duration of pregnancy, and stay off if I breast-fed. That means I would likely be rendered mostly immobile for that whole period, unable to walk without pain, make a fist, or open my mouth very far without pain.
No, I don't think I'll have children. There are enough in the world as it is, I can help out other folks with theirs when I want a dose.