My wife is like that. Does some things with her left and others with her right. I've told her it means she's probably possessed or something.1. I write left-handed, but I play guitar right-handed, throw a ball with my right hand, and there are many other things I do with my right hand as well.
Same here.3. I am the youngest of 6 children from the same parents
I can print tolerably well with my left hand, but I'm in no way cross-dominate. When I was a kid in school, I used to turn my notebook longways (landscape) and print notes left-handed, just to irritate a few grumpy teachers I had.