Sometimes, if two females are performing 69, the mayor of Funkytown may appear, usually sucking on the genitalia of the two females at the same time. This is called Raphumsex.
(if you don't believe me check Wikipedia) ==>
The two chicks were surprised to see the mayor of Funkytown show up with a boner when they were performing double taco 69, or as the French would say 'soixante-neuf', or as the German would say 'neunundsechzig'. Some crazy mythical Raphumsex was about to go down.