"While the intricacies and nuances of the Brain Fucker courtship display really demand a separate volume (although they're treated at some length in Supplement XIX to the Fourth Edition) the editors feel that a brief overview of the topic may be both useful and educational for the open-minded layreader.
Single brain on floor - ""Welcome""
Single brain on spike - ""I saved this brain for you""
Two brains on floor - ""Boy, this weather""
Two brains on two spikes - ""I respect your autonomy""
Single brain on floor next to single brain on spike - ""I am career-minded""
Two brains on single spike - ""Romance is important to me...""
Single brain covered in silly string - ""...and so is a good sense of humour ;o)""
Three brains in a crate - ""Mine cup runneth over""
Several brains on a single spike - ""What am I doing?"""