Not kidding, unfortunately. Don’t know anything about it other than people do it. I don’t get it either.
That is not the best part though. It is the chemicals used!!
“Hydroquinone, (a chemical also used in photo processing, hair dyes and rubber manufacturing), mercury and other lightening chemicals inhibit the skin's production of melanin, lightening the applied skin area.”
http://gaylife.about.com/od/healthfitness/a/analbleaching.htm
Long term mercury poisoning! That is painful and detrimental.