my cat sits on the chair next to the computer, she used to walk on the keyboard a lot but i told her "no" and she don't do it any more but she still sits on the desk chair, shes cheeky with that because every time i get off the chair she will hop on it and lie down, what we do to get her off is to pretend to sit on her and she jumps off lol. she also likes to lie on my lap occasionally when i am using the computer.