Ellie is obsessed with the Diary of a Wimpy Kid series of books. Which means that Brad is also smitten with them. I thought the books might be a little too old for Ellie; let alone Brad. Bradley's new favourite joke, courtesy of DoaWK...
Boy goes to the Dr's office. Says he needs a new bum, because his current bum has a crack in it.
Cue roars of laughter.
*Please note: Mom insists they say Bum instead of Butt when telling this joke. The book says Butt.
** Further proof that no matter how much a mother can try to discourage her kids (boys especially) from potty humour, it is a futile effort.