oh yeah, i forgot to mention reasons 2 and 3:
2: an ex-gf used to call me this. i intentionally only treated her well 75% of the time, bc she refused to take the necessary action for our relationship to take the next step. (she meant 'demon')
3: [Guiguzi](
http://en.wikipedia.org/wiki/Guiguzi): possible teacher of sunzi & founder of the school of diplomacy in ancient china.