A SheKnows reader writes, "I have a toddler who will be 3 in November. I have recently learned that his father has been forcing him to use his right hand. This concerns me, as I believe that my son will eventually gravitate to one hand or the other. His father does not accept this." She asks, "I would be grateful if you could provide a reference to the current wisdom on right/left handedness and allowing a child to choose.