The best fishing partner I had was my cousin, he is a lefty. We could both get on the front casting deck and hit the same target but from different angels and never be in each others way. Well maybe the time he knocked a easy 5 pounder off my line with the net..

I cast spinning with my right an retrieve with my left, I think it has something to do with the wider rotation of the reel handle. I've tried others left handed casting reels and it just wasn't comfortable. I would get out of sink trying to reel it back. Easier for a old dog to continue what he does best, sleep on the porch.