I read this one in a magazine:
Me and my friend went to the supermarket to buy tampax and we didn't know where they were so we asked a shop assistant. She then asked us whether we wanted the ones that you push in with your thumb or the ones that you hammer in. We were completely dumbfounded and then she said 'You did want thumbtacks, right?'
This made me laugh sooooooooo much when I first read it!!!YOU HAVE TO READ THIS!!!