Please answer this questionable question: Why do we wash bath towels? Aren't we clean when we use them?
Please submit more questions.
Bacteria can grow on wet towels
Its washing the dirt off of your body
The water can make them moldy.
some people do re use them, (a couple times) but no matter what a shower doesn't kill 100% of germs. it's just more sanitary to wash them after you use them