My friends DS (5) dressed himself the other day and when my friend went to pick him up from football practice she realised he was wearing his pyjama bottoms...he had just put his school trousers on over the top.
I would say 'didn't you check' but my son went to school with is jumper on backwards and I didn't notice. (Its a sweatshirt stylee with a HUGE emblem on the front).
He's also had the misfortune of seeing yesterday's underpants escaping from the bottom of his trouser leg... in my defence I am teaching him to be more responsible and could have sworn I'd given his trousers the once over and good shake.
I wore no knickers with my maxi dress thinking 'meh, long skirt' - gust of wind on the sea front, in front of a coach load of OAPs. You know the rest.