Why are dogs and cats the most popular pets?

It's most likely that those two animals are the most in need and of course they've been the world's two pets for generations. I mean, I love monkeys but I don't think I could have a monkey in our city apartment.

I can see your argument with a rabbit, but if you use a monkey as an example then why not a tiger, a leopard, a cheetah, a rhinocerous or a koala bear?

These two animals have the worst luck and should be taken by loving families that have the room to take care of them.