Ideas which have been developed simultaneously or in immediate succession in the same mind mutually reproduce each other, and do this with greater ease in the direction of the original succession and with a certainty proportional to the frequency with which they were together.
Everybody has a language or code that they use with their wife or their girlfriend or boyfriend or what have you. It's a language aside from the language they have with strangers. I've always been maybe an abuser of alliteration, but I've always loved it and I like how those words sound together.

