It's always been ok. How old were you when you were taught about gender? I remember teachers sorting us by gender. I remember "Sugar and spice and everything nice, that's what little girls are made of. Snips and snails and puppy dog tails, that's what little boys are made of." How old were you when you were first introduced to the idea that Mommy and Daddy were married? Attended a wedding? Should we ban children from being ringbearers and flower girls because they is participating in socially sanctioned sexual expression? It makes as much sense as banning a book where Timmy has two dads or firing a teacher for mentioning their same sex spouse.