Wee Z "What did the zero say to the eight?"
Me "I don't know, what did the zero say to the eight?"
Wee Z "I like your belt!"
Me "Haha, that's very funny! Did you tell that at nursery?"
Wee Z "Yes and everyone laughed except for one boy. He didn't laugh!"
Me "Ah well, maybe he didn't understand it."
Wee Z (in an almost exasperated voice) "He speaks English Mummy, of course he understood it!"