The Chemist Who Hasn't Showered in 12 Years Explains Why He Doesn't Stink
motherboard.vice.com
motherboard.vice.com
This guy seems to have done both for skin bacteria.
It's worth noting that he washes hands (presumably after visiting the bathroom) and he bathes in order to remove dirt (as opposed to remove sweat)
So, if he (and this is speculation) washes hands after bowel movement, shouldn't he be washing that area regularly as well?