Taken from
http://www.bukkake.com/overview/hist...f-bukkake.html
Legend has it that in ancient Japan, women who were found to be unfaithful were publicly humiliated in the town center by being tied up while every man in town ejaculated all over her to show his distaste. Basically, they were saying that if you're going to take it from someone else, you're going to get it from everyone else. So although many feel that the practice of bukkake is shameful and degrading to women, it must be remembered that bukkake originated as a form of punishment and is meant to degrade.