Here is a bit more background on his thinking.  He makes some interesting points:

Whitlock first began his no-showering lifestyle after a friend asked why her horse would roll around in the dirt during the springtime. He wondered whether the horse was somehow coating itself with a beneficial substance in the soil. He came to the conclusion that the horse was coating itself with bacteria species in the Nitrosomonasgenus, which is found living on a broad group of vertebrates and invertebrates, he said.

Earthworms, freshwater turtles, clams, mussels: Essentially every organism that’s in contact with either water or the soil will have these bacteria living on it,” Whitlock told Live Science.

Unlike most bacteria found on the human skin, Nitrosomonas bacteria break down ammonia, producing nitrite and nitric oxide (NO), he said. Nitrite is a powerful antibacterial substance. Meanwhile, trillions of receptors for nitric oxide are found in almost every cell in the body, and the substance does everything from relaxing blood vessels to modulating communication between brain cells.

Is this reasonable?  The organisms that he references do have very different dna from us.  Although it also sounds like a clever comparison.  What do you think?  Or is this a bad idea and just going to make a strong smell?  Feel free to comment.

thanks to livescience.com for the great info