Who doesn't love a good massage? It's just the ticket after a hard day of gardening. Or even a hard day sitting in front of a computer. Maybe especially after a hard day in front of the computer. Those muscles really need some kneading.
And who knows kneading better than cats? In our house, we call that action that they do, rhythmically pressing on the object of their affection with their paws, "making biscuits," and we do have some prime biscuit-makers.
The cats in these videos, though, could certainly give our cats stiff competition in the biscuit making business. Their canine friends are just happy to be kneaded.