What age is the norm to teach your lo to wipe their own bottom after a poo? My DS is 3.2 and nursery told me they'd had to change his trousers as he'd tried to wipe his own bum and his clothes ended up covered in poo. I have no intention of teaching him yet as he's really not ready and my biggest worry is him walking off with pooey hands and spreading the mess.
What age did others do this??