As far as young kids asking for sex changes, I haven’t heard of that happening with anyone I know, but that’s not to say it doesn’t happen. And if it does, thats a conversation parents should be having with their children if it comes up. I know if I had children I would not allow any surgical operations of that sort to happen until I felt the kid had matured enough to think thru things thoroughly (by that time they would be young adults anyway). Now, non permanent gender expression? Sure. If I had kids they could wear whatever they want (within reason)