I'm a southpaw myself but I can't do anything with my right hand. The only thing i can do with my right hand is count to 5.There is a muscle-memory on defense to block the right hand because that is what you do most of the time ... it just takes a quarter of a second for your mind to figure it out, but most still start out going for the right hand ...
Also, many lefties are really anomalous dominant ... that means they "should" be right handed, but aren't - if that makes sense. It has to do with right-eye dominant or not. Anyway, they do tend to develop better right hands because they should have been right handed.
But all jokes aside I can tell you most lefties are right eye dominant. I played travel ball with 5 lefties on my team out of 12 (yes, 5 it's an absurd number) and we've all agreed when looking back we are right eye-dominant people.