No, I don’t want kids

With my sister adopting a child recently I have had a new bout of "So…when’s the next grandkid?" aimed at me.
My general response is either, "It’s not." or "That generally requires at least a boyfriend."
I have not dated anyone seriously in almost ten years, not that I have not been dating and trying to met people.
I would love to find someone to spend the rest of my life with.
However, for me, kids are not exclusive with that.
Frankly, I don’t want them.
I love my niece and am sure I will love the new nephew but it does not mean I want children, nor does seeing babies because my ovaries to explode with baby wanting hormones.
I don’t trust my temper with my dog, why would I trust it with a child?
Most of the time I am too fucked up in mind and body to every want to pass these genes on to another human.