Answer

Kneading is a cute behavior to watchdcats flex and extend their paws against a bedspread, the carpet, or a person, usually while stretching and purring. It’s a very common behavior for cats, but no one has determined exactly why they do it. All sorts of theories exist. Some say that "kneading" cats were weaned from their mothers too early; some say they were weaned too late.

Most likely it’s just a habit some cats develop, like people that bite their nails or crack their knuckles. What theorists do know is that it’s a sign that cats are comfortable, happy, and relaxed. So you can take it as a complement: it’s your cat’s way of saying that he’s happy you’re around!