If you have a computer, you know that your cat will likely walk across the keyboard and stick its butt in the screen. Of course, cats don’t care about computers by themselves. It’s just that cats learn that computers captivate their human’s attention.
Therefore cats have reasoned that if they get in between you and your computer, you’ll pay more attention to them. That works because cats make a nuisance of themselves, but humans reward the cats with attention, which causes cats to come back and walk across the keyboard even more.
So the next time your cat bothers you near the computer, just remember it’s all your fault for being nice to your cat in the first place.