I'm So Sorry I Had the Nerve to Touch You

Sometimes I go to pet one of my cats and they purr super loudly. I feel so loved.

Other times I pet my cats, and they seem less into it. Then when I stop petting them, they frantically give themselves a bath.

What's up with that?

It's like if I gave into my instincts and immediately put on the hand gel as soon as I finished shaking someone's hand.

At least I (usually) have enough politeness to wait until the person is out of sight.