Ive seen a dog hump inanimate objects so I don't think thats a great gauge.

You clearly weren't interacting with horny cats.

Cats have standards.

My cat hates every other cat it meets, but loves every person it meets. I think it knows the difference.

That anecdote presents an opposite case.

Your leg breeding your cat? Im confused

cats are just basically asexual outside of mating season afaik, whereas either wolves already don't have a specific mating seasons or dogs just inherited our lack of one..

it's one of my favourite things about cats, you almost never have to worry about petting them in the wrong place (you know, provided the cat trusts you) nor do you have to worry about a red rocket sighting