Anyone with a cat have this issue

So like 3 or 4 this morning Ninja pushed on my SO and I until we woke up. I thought he just wanted attention so I pet him and he started licking my hand, after he bit me. My so says he does that sometimes and doesn't know why. Anybody have a cat and know why they do this or is it just Ninja? ( I'm hoping it's just Ninja because he's giving me one of his kittens once they are old enough 😐)