Why Cats know when we are doing something important?

I mean it. Every time I start to work on something one of my two cats insist on coming over and sitting down right in front of the computer screen. Or whatever thing I am working with at the moment. I have been sitting here reading one of my favorite bloggers, Dick Stodghill. No cat. I decided I needed to write more to my blog. I get all ready to go, signed in and to the right page and sure enough a cat comes along. He doesn't just stop in to say hi, no he sits in between the computer and myself. He has to rub his dirt invested furry self in my face. Then they are highly offended that I didn't want them to sit in their desired locations. The adult cat is also guilty of this offense. I don't know how they sense it. I can be sitting here for hours doing mundane things, but the second I want to start actually doing some work poof there is a black vision. (Both have black fur, one is black and white) Then to show me that they don't appreciate my lack of excitement for their generosity in allowing me to pet them, they do a full body clean. Right next to me, making sure to stay within my vision. Their next favorite thing to do is run by just at the moment that my hands are full. They particularly like it if my hands contain food. That way, I spill the food. This leads to them enjoying a nice snack. Which I must say, is the only reason they tolerate the girls. Little girls are always spilling tasty morsels for them to pick up. As long as they get to it before the dog. The dog has her issues also, but at least she does it by accident. Whenever she barks and wakes up the baby, she has the decency to look ashamed. She is embarrassed and very sorry for intruding on the family. Not with the cats. Apparently, we intrude upon them. They feel that six a.m. is the perfect time for them to eat. We have the nerve to sleep. They believe that the bed is theirs. Just because they allow us to sleep in their beds does not mean we can pick our location. Sure, their tails stick out five inches from their bodies. That does not give us the right to step on them. Who cares that you can't see them in the dark. It's not their fault that humans aren't as superior as cats with their night vision. If my cats had computers, I'm sure they would be writing on their blogs complaints about us humans. I can see them now. I'll leave their blogs to your imigination. I have to go feed the cats.