I watched a National Geographic special comparing wild cats with domestic. A part of it compared how they play. Turns out domestic cats like to play rough, as do wild.

After that when my cat would playfully bite my finger or arm, I'd swat it, hard enough to send it tumbling across the bed. The cat loved it, and would come charging back either to nip me again or purring away to be petted. After a while, when she would nip me she'd lower her ears and wait, expecting the swat. If it didn't come, she'd nip me again and duck back, ears down, looking at me until she got it. Then life seemed complete.

After that started that cat became my almost constant companion.

Arf