BradLantz,
Some things are easily switched, like batting a ball, I can hit either side, but catching & throwing is southpaw.
I never tried tennis, but 1 of my buddy's girlfriend was a semi-pro & instructor & talked me into playing 1 day. After about 20 mintues she stopped & hollered "I just figured it out! You don't have a backhand!" I would just switch hands to whatever side the ball went. She had never seen that before.
It was just a natural response on my part. Do you walk left or right handed? It's just done without a thought.
Course I won't deny that I do have "problems"...laffs... I am also one of a small percent of the population that has non-linear thinking, extremely so. Went to elementary school but never graduated, went to high school & never graduated, went to university, wasn't even registered, just went to the classes & lectures I was interested in.