When a cat makes biscuits, it is kneading or pressing into and "kneading" various surfaces with its paws. This behavior is also known as cat kneading, and it can be described as rhythmic pawing and the opening and closing of the paw to express happiness or some other feline-fueled emotion. The motion resembles a baker working bread dough, hence the name "making biscuits". Cat kneading is a natural behavior of cats, gained from instinct during kittenhood. There are several reasons why cats knead, including:

• Instinct from Kittenhood: Kittens often knead their mothers belly to stimulate milk flow, and this behavior is carried into adulthood.

• Showing Affection: Kneading is usually a sign of a contented and happy cat, and cats may knead on their favorite person to signal that they feel safe and happy.

• Stretching: Kneading is also a method of stretching, and cats may knead on a surface to hold on to it while stretching their back, shoulders, and hind legs.

• Marking Territory: Cats have scent glands in their paws, and kneading may help activate these glands to mark their territory.

• Preparing a Place to Sleep: Cats may knead to prepare their bed, similar to how they pat down grass or other vegetation in the wild.

• Comfort: Cats may simply find kneading soothing, and it may be a way for them to relax and feel comfortable.

Overall, cat kneading is a normal and natural behavior that cats use to express themselves and communicate with their owners and other cats.