The South paw disease

I was training a new person on Thursday night, and they tend to give me "the winners". This one was having issues figuring out the shrink wrapper, so I asked him if he was left or right handed. He said his doctor diagnosed him as left handed.
(I'll let that sink in for a few seconds.....)

 Being ambidextrous, I took offense for both the North and the South paws. 
Now, what I want to know is.. WHEN did being a South paw become a disease, and require a diagnosis from a doctor???