Part of my business involves customers that paint cars. I swear that at least 25% of the people that paint cars for a living are lefties.I find this interesting. My daughter and one of my sons write left handed but do everything else like throw with their right hands.
Today my daughter received her pump training. Her trainer is a lefty and type 1. The trainer's husband is also a lefty and type 1. Of course this is a very tiny sample but it made me wonder if there might be a relationship between being left handed and being type 1. Being left handed raises your chances of having allergies and other conditions.