I have a "left-handed" and a "right-handed" cat... The lefty (below) is Max. He actually adopted my son who, coincidentally is left handed. So when he sits on my son's lap, Mike rubs his head and pets him with his right hand as he (Mike) continues to mouse around the internet left-handed (aka NO loss of productivity).
Cosmos - the seal point Siamese, is a right hand cat. He sits so he gets petted with your left hand...he sleeps on the right, exactly opposite of Max.
And so, when Mike is not around and Mom is assigned to pet him, Max sits on my lap and demands to be petted with my right hand...thereby reducing my productivity to ZERO!! That's my excuse and I'm sticking to it. Hey Max...mom loves you anyway!