Tito has bit me two times. Once when he was getting too friendly with my bunny, so I took him by the scruff of the neck to put him in another room, and he turned around nipped me. And the other time is when I was trying to clip his nails (which he hates, he has a weird thing with people touching his paws). Now the only person how clips his nails is the vet, and only when he is muzzled. Bella and Bo would never even think of biting mommy. And Oliver the cat bites when playing.