Cats often have some bad habits, some are innate and some are simply due to their playful nature. Some common cat habits include chewing textiles and squeezing into crevices. While squeezing into crevices can lead to hygiene problems, it can also damage our textiles and clothing and pose health risks to the cat. So, why do cats like to squeeze into crevices and chew textiles? 
I. Why cats like to squeeze into crevices
I've seen many cat-themed furniture items in pet stores; they're all boxes with a hole in them, which cats instinctively crawl in and out of. Cats' love of squeezing and crawling is a long-standing development, much like how humans gradually learned to walk upright. Long ago, cats slept in caves, tree hollows, and rocks. Their flexible bodies allowed them to develop a remarkable ability to contort themselves, making it easier to catch mice and find food. Another reason cats crawl into tree hollows and rock crevices is for safety; large animals and wild beasts can't squeeze in there.
Although cats have been pets for many years, their innate habit of squeezing into crevices (small spaces) hasn't changed. In everyday life, cats will squeeze into narrow spaces like door cracks, cardboard boxes, and so on. Since there are no tree hollows or rock crevices for cats to squeeze into in their homes, other objects with small spaces become their targets, such as cardboard boxes and paper bags. Once a cat feels very comfortable inside, it doesn't want to come out and will even start to sleep comfortably.
Cats' love of squeezing into boxes stems from their natural instincts. Cats are inherently "security-conscious," especially before they were domesticated. To better protect themselves from attacks by other animals, they developed the habit of squeezing into crevices. Even now, as pets, this habit hasn't changed.
II. Reasons why cats like to chew textiles
Some kittens love to put textiles in their mouths, perhaps for comfort. Most kittens do this, some don't. But those kittens that don't seem to have this habit might not only enjoy chewing on these things, but may very well have already swallowed them whole. For some reason, these cats seem to prefer wool products.
We don't know why this happens, but it's quite common in Siamese and Burmese cats. It's also common in kittens weaned early (2-4 weeks), and while we're not sure early weaning always leads to this habit, it's likely related. Since swallowing textiles can cause very serious digestive problems, we must try to prevent it. It's best to store clothes in closets where they can't reach them.
If this habit has become so severe that it must be forcibly stopped, then medication is necessary. Some researchers have pointed out that giving them leather toys might divert their attention from their clothes to the toys. This is a method worth trying.
Cats have a bad habit of chewing textiles, and owners must help them correct this habit when they discover it. Some cats chew textiles, but sometimes they may swallow them out of curiosity or accidentally. If we don't notice in time, it could potentially endanger the cat's life.
