I can understand that if it's your choice it is as normal as daylight and can be relaxing, but I don't think it's all that healthy if the underlying causes is negative, that just means that you have not dealt with certain things or that you might have an illness, ie OCD... In the end it can get horribly out of hand if it is not controlled and as KD said, understanding the underlying factors that cause it... If it is something like OCD it might well start to spill over into the rest of your life... It might also be a sign of abuse, people who were abuse, especially sexually, are more likely to develop a compulsion toward cleanliness... be it your own body or your environment...