The reasons why cats like to sleep on their owners’ arms:

1. Cats sleeping on their owners’ arms show that the cats trust their owners very much. Cats will do such intimate actions because they feel warmer and have a certain sense of security around their owners.

2. Cats are very independent animals. When they start sleeping on your pillow, it means that the cat has accepted you as its owner.

3. Some cats find it very comfortable to rest on their owner’s arms, so every time they want to sleep, the cat will come to you and then sleep peacefully against the pillow.

4. When a cat is bored and wants to attract its owner’s attention, it will sleep on its owner’s arm.

5. If the cat spends the most time with you and the owner usually takes care of it, then the cat may regard the owner as its mother and sleep on the owner's arm.

6. The cat’s curiosity is really strong. It will sleep next to its owner, or even sleep on its owner’s arm.

7. The cat feels that the owner’s arm will not move around or crush it, so it will sleep on the owner’s arm.

8. The cat owner treats the cat as the closest person, and occasionally acts coquettishly towards the owner, and will sleep on the owner’s arm.