I'd never say "never," but interestingly, I never felt that "pang" of desire when I'd see a mother with her child--however, I would occasionally get it when I'd see someone with their dog. I mean, geez, I hung out on Pet Talk when I didn't even own a dog; what does that say about me?

The decision whether to have a child is so personal, and so impactive, that I'm always surprised that people feel so free to hand out advice, etc. on the topic of whether to have one or not.