I Often Wonder What My Cat Is Thinking [Cats]

My cat can really shake his booty. Every time he jumps up in my lap he starts swishing his tail in my face. I discovered that if I hold onto his tail so he can't slap me in the face with it then his butt starts swishing while his tail stays stationary. I start telling him to 'shake your booty' but he doesn't look like he really enjoys it.