Jon, I learnt the correct was to eat Tim Tams when in Oz:
- nibble the chocolate off each end
- hold one end in your mouth and dunk the other end in a cup of coffee
- suck the coffee through the biscuit
- once the coffee comes through, get the whole biscuit in your mouth before it melts/falls apart, and enjoy.
It is an experience to be savoured, and works equally well with Penguins. A six pack of penguins can easily be demolished in about 2 minutes using this method.