I sometimes wake my cat up when he's dreaming
Why would you wake your cat up like that?
I enjoy the expression he has when he wakes up.
You probably shouldn't wake your cat up when it's sleeping, as it's rude. You might also find yourself getting bitten or scratched.
But I'm a human and he's my pet, so I can do what I want.
It's true that he's your pet, but you shouldn't wake him up just because you can. People are supposed to respect animals, not treat them like toys. I think you should stop bothering your cat while he's dreaming.