The kneading behavior of cats is an instinctual habit from birth. Baby kittens knead their mother's mammary glands to stimulate milk production. This kneading behavior is usually a sign of contentment.
It's instincts, they are probably hungry because when they were kittens they probably knead there mother's bellies when they were hungry. Not quite sure why they chose blankets but every cat has there own little thing, my cat kneads my pillow :)
-edit i left out a whole sentence-
This may have an origin going back to their wild ancestors who would have had to tread down grass or foliage to make a temporary nest in which to rest, or possibly a remnant of the newborn kneading of the mother's teat to stimulate milk secretion: kneading is often a precursor to sleeping. Many cats also purr when kneading; they also do this mostly when newborn, while feeding or trying to feed on their mother's teat. The common association between the two behaviors may indicate the origin of purring as a remnant instinct. Some experts consider kneading to "stimulate" the cat and make it feel good, in the same manner as a human stretching.
There are a couple different theories.
One is that cats knead when they are kittens while nursing. This instinctual kneading helps stimulate the mother's milk production. They continue this into adulthood possibly as it reminds them of the comfort they took while nursing.
Another possible reason is that your cat is returning the affection you are giving.
my opinion is that (i dont have a cat but.....)i should take it away!JUST KIDD'N!but probably its just wants to rest!.........D.R.
No hes a kitten
then hes probably bald.
ashfur from warrior cats is a boy even though some people say hes a girl and that hes in love with scourge hes not and hes also not a boy fancying boy cat.( :
Hes Gayer the gay, more gay then ever gay before. hes friends with george michael.
of course not he hates her, she sings and everything is ad and hes dating cat.
nah hes a mad dog
hes very mad for some reason!
!
Stress can cause a cat to be grumpy and aggressive towards people
yes
hes a peedo i would touch him <3 he is beauitiful
hes the same peter as peter pan