I was/am completely ambidextrous. my primary school teacher (had the same one from kinder to grade 2) found it amusing and encouraged me when writing large amounts to write left handed on the left page and right handed on the right page. I had fully developed writing skills in both hands but found as I got older that I preferred my right hand for writinf, and my left hand for everything else. I completely lost my ability to write with my left hand in 2009 after injuring my hand quite severely. I actually miss it, I found it a very handy skill to have.