My curent orange and white tabby used to do that when she was younger, but at 12 years old, she spends most of her days sleeping even more. She's very gentle and tolerant of people. She doesn't scratch, but instead paws at you if you annoy her. If that doesn't work, she will grab your hand with both paws and do a VERY light bite, followed by a "I'm sorry" lick. Though, the bite thing was just something she had all of her life.
My Siamese on the other hand (R.I.P), had a VERY mean bite. While patient and tolerant, when enough was enough, she would lay down the law. Keep in mind that she had to deal with 3 kids that treated her almost like a stuffed animal when we wanted to hold her and the neighboring territorial cats while being declawed on her front paws only. If you were giving the two cats ham, the tabby would bite only strong enough to tear the section that her mouth caught. Give the Siamese ham, and the only part of the have that was left would be the section in between your fingers, all in one bite. I appreciated that cat. She might have seen us (my two sisters and I) as if we were her kittens, which is why she was tolerant, even at the ripe old age of 19-20. HOWEVER, the tabby was a nuisance to her when the tabby was young, and the Siamese, while not aggressive, would get annoyed. Now my tabby is about the same age as my Siamese was when we got our current dog, and now everything came full circle. My dog loves following my tabby around, but the tabby hates it. They respect each other, luckily.
Speaking of my dog, I don't think she knows how to bite anything except bugs. She actually went on a barking spree against an adult possum that decided to make a bed between two boxes. That thing hissed. And again, a young possum that was probably 2-3 months old was hissing and snapping at her, and all she did was bark at it out of interest. She patrols and stares at my backyard fence for very long periods of time, which has mice on the other side. No dead mice other than one that died from old age or from something my neighbors did. Heh.
Sorry for turning this into story time. =P