Y'know, I can actually understand that, although I don't have a fear like that
My confession: I don't use soap in the shower. It sounds weird, but through research I discovered your body doesn't need soap to be clean, unless you already use soap. If you train your body to not get used to it, then all you need is running water in the shower, and to just act as you would with soap, just, without it. I still use shampoo, and still wash my hands with soap and water. There's no odor or anything, I don't smell any different then I or anyone else did using soap, and my skin doesn't dry out as easily either :P