Some people's shower practices

It bothers the hell out of me how people wash themselves. I didn't know about everyone, but knowing that there are (I assume) plenty of people out there who wash themselves everywhere with the same sponge or cloth, it's even worse if you wash your face with it. How can someone wash there face or any part of their body with the same cloth that they use to wash their ass? It defeats the purpose. I use two sponges ,one for my body and the other for my butt, and I use one cloth to wash between my legs.