So taboo is this subject, that I have no idea how common this mothers experience is. As she herself said, There is no way I would have brought that topic up with another mother. Whether she was a little over-zealous with cleanliness, I dont know. She certainly felt she was doing the minimum required of her.
Regardless of these issues, for it to happen completely unintentionally with three different boys illustrates how easily it would happen if done deliberately by anyone who has wormed his way into a little boys trust.
I know a female school teacher who once worked in a third world setting in which it was school policy to shower little children before lessons began. Her experience seems to have been much the same as this mothers but at the time she was too naïve to realize what was happening.