He came over and started bashing at his boy bits, so I asked if he wanted a fresh nappy... he said "Yeah!", wandered off and produced the changing mat, babywipes, and his longies (not a nappy though , but he insisted on longies rather than jeans).
Changed him and found poo!
He can't be old enough to tell me he is dirty.
He just can't.
He doesn't seem to notice if he poos without a nappy on though, so methinks tis just the sitting in it that offends