You drill a hole in your head, to let the bad spirits out of your head.
Very popular in the middle ages.
( Wildheart Baby. Drunken Mess In A Good Way, Sat 23 May 2009, 22:36, archived)

if it stops my headache
I'll do it.
(Poppet some assembly required., Sat 23 May 2009, 22:38, archived)