The reasons why cats always look out the window:

1. When a cat feels bored, he will look out the window, simply in a daze.
2. When a cat feels anxious, he will also look at the scenery outside the window to relax him.

3. Cats are very curious. When there is movement outside the window, they will want to take a look out of curiosity.
4. When the owner is not at home, the cat misses the owner and will keep looking out the window, searching for the owner to see if the owner is back.
5. When a cat sees a bird or flying insect outside the window and wants to catch it, it will keep staring.