Reading the Doesn't he/she make you want one too thread makes me think of the disbelief I've generated when I've stated that I do not want a pet. I acknowledge that animals have their place, and the assistance animals are a blessing for those who need them. But, I don't want one.
I'm allergic to cats. They give me hives and make me wheeze. I know you think
your cat is different and I will surely like
your cat. No. I won't. Yes, I'm sure. I do not enjoy Eau d' Litterbox or shed hair. I get physically ill when I see your cat walk across your kitchen table and countertops or jump on your bed.
I do not want a dog. Yes, I'm sure. I don't like the way they smell. I get agitated when they pant. I don't like drool on my shoes, licks on my face or hair on my clothes and furniture. I don't want to play pooper-scooper in my yard or the neighbors. What do you mean he sleeps in your bed, under the covers with his head on your pillow.

Ewwwwwwww. No, thanks.
I do not hate animals. I can't stand to see them mistreated or neglected. I think people who do those things are vile and should be prosecuted. But, I don't want one.
Yes, the kitten is cute. No, thank you, I can't take it home with me. Yes, the puppy is adorable. No, thank you, I don't want to take it home with me. No, I'm not heartless, mean, selfish, cruel or un-American. If I took a kitten, pup, gerbil, bird or guppy when I have no interest in feeding, walking, grooming, cleaning up after or playing with it I would be doing the poor creature a terrible disservice. Please just take my "no, thank you" and get off my case.