LOL!!!! Booger is a big 14 pounds or so... but she doesn't massage us. She kneads up a storm - and because she's inside/outside, we don't clip her claws. We keep a thick sweatshirt around for when she wants on a lap or watch out - YEOW!
Little Munchie kneads with all four paws! When she gets excited (waiting for dinner, at the beginning of "chase the mouse," etc.), she'll stand there and knead with all four - she looks like a wind-up toy or something kind of bobbing in place - it is too cute.