The answer is that there is a kind of feynman diagram for performing calculations in quantum field theory called a penguin diagram. This lovely picture from Wikipedia shows why:

For more information about feynman diagrams and this picture in its natural habitat check out this link.
* tutu is a verb meaning to fiddle or play about with something which I first encountered in Whangarei. I have only met it from New Zealand English speakers from Hamilton and northwards although it is spreading south. It is mentioned on this New Zealand English site and there are a couple of other examples of it being used here.
As a Wellingtonian I am slightly embarassed that a word which might be associated with Auckland has colonised my vocabulary but I feel the word's derivation from the Maori for trouble-maker makes up for that.
