. . .but if you can, check out Louis vs. Rick. It is the story of a man who taught his cat how to IM him. Start from Episode 1 and work your way through--there are only eight episodes up so far. It's worth it. I laughed so hard I cried, and then ended up with the hiccups. So maybe you shouldn't read it if you're prone to the hiccups if you laugh really hard for a long time.
However, if you have a cat, you will relate. I have a cat, and yes, if she could IM me, she'd do pretty much the same thing. (Well, she doesn't pee on people's things. She'll just roll around in them and sleep on them. BECAUSE IT WAS IN MY SPOT, MAN.)