A Question of Linen Hygiene

I have a disagreement with Mo-Licious, and I want to pose the question to you folks: how many times can a bath towel be used before it ought to be washed? Miss Mo's under the impression that once you've used a bath towel once, it's time to wash it. I'm of the inclination that one can continue to use a bath towel longer than just one day; let's say a week for the sake of arguments, though usually I go longer than that.

Post your thoughts. Or, if you're looking for something a bit more serious, have a look at my long post about Hamas, which can be found directly below.