I was about five when I decided I'd rather raise kittens than children. Before that, I can't remember thinking anything concrete about bearing children. I know I was given dolls to play with, but there came a certain point when I was disappointed with dolls, and definitely wanted books instead.
At about nine, when a relative by marriage commented on how I'd make someone a good wife someday(because I'd baked gingerbread from a box mix), I retorted that I never wanted to get married. Their reaction was as if I'd suddenly sprouted horns, a forked tail, and my breath took on the distinct aroma of brimstone.
How about you?