 Some cats are simply clingy by nature, with some purebred cat breeds like the Siamese and the Abyssinian known for their clingy personalities. But in some cases, clinginess can be a sign that something is up with your kitty, therefore, it's important to pay attention to what might be causing this behavior. One or more of the following causes might be behind your kitty's clinginess. Your cat might be clingy simply because they aren't getting enough mental and physical stimulation. Taking breaks to play with your cat and providing interactive toys to help keep them active and entertain throughout the day can help in these cases.