There is "play" biting, and then having adult cat teeth sink deep INTO your hand/arm/muscle.

Even breaking the skin is not the same as a deep puncture wound...the latter can be very serious.

When I worked at the cat boarding kennel, I was on antibiotics twice in the same month for deep bites from the same cat - and the kennel owner went for daily IV's at the hospital.

I hope you never have to experience it.