Thinking Quickly

A man came into a local supermarket and asked to buy half a head of lettuce. The boy told him that they only sold whole heads of lettuce, but the man replied that he did not need a whole head, but only a half head. The boy said he would go ask his manager about the matter. The boy walked into the back room and said, 'There is some idiot out there who wants to buy only a half head of lettuce.' As he was finishing saying this he turned around to find the man standing right behind him, so he added, 'and this gentleman wants to buy the other half'. The manager okayed the deal and the man went on his way.
Later the manager called on the boy and said, 'you almost got yourself in a lot of trouble earlier, but I must say I was impressed with the way you got yourself out of it. You think on your feet and we like that around here. Where are you from son?'
The boy replied, 'New Zealand sir'.
'You're joking ! Why did you leave New Zealand?' asked the manager.
The boy replied, 'They're all just whores and rugby players over there.'
'My wife is from New Zealand!!' said the manager
The boy replied, 'Really! What team did she play for?'