is an activity common to all domestic cats whereby, when in a state of ease, they alternately push out and pull in their front paws, often alternating between right and left limbs. Some cats actually appear to "nurse" or suck on clothing or bedding during kneading. As with most domestic animals but especially cats and dogs they retain juvenile characteristics and behavioural traits. Kneading is something a kitten does to the nursing queen to help massage the mammary glands to produce more milk. As they are weaned they no longer need to do this and tend to do it when very content. This releases pleasurable endorphins for the cat, as it was once an instinctive thing to do.