This might have some useful information, assuming you haven't already checked.
http://en.wikipedia.org/wiki/DoucheWhile I don't have any direct experience of this practice, I do know that human skin can behave in various ways, in relation to antagonists, depending upon the individual. Some people can experience quite extreme reactions to something taht most have little problem with.
In other words, we are all different. Carefully monitor how you react, especially with such a sensitive and important part of your body.
Adjust according to taste.
(I just wish I was able to join you all. Good luck).