ppl say "oh, you'll change your mind" as if I have no choice in the matter, as if I'm just a slave to my meat. It makes me want to slap their smirking faces.

I've found a way to reply!
I tell them I'm waiting for 40 -- because then my doctor will let me get spayed.
I don't get flak after that. Nothing quite like pointing out that they're viewing me like someone at a puppy mill.