I don't know what it's really called, my mom used to be a vet tech and she says it's called "needing". When Jinx is in our laps, he'll bury his head under our arms and start going back and forth with his arms on my arms. It hurts because his claws come out, and he always bites a place on my arm while he is doing it. I mean is this normal? Mom said it's what cats do when they are getting milk from there mom, but the should have grew out of it within a month or two. Fact is, Jinx is five months old. Is this common?