No Man Is An Island, He Is An Ecosystem

This article from National Geographic Magazine will surely take away your appetite. It's about 'life on the human body.'

Our skin is a habitat for roughly as many bacteria as there are people in the United States, for fungi and viruses, and on occasion for mosquitoes, fleas, bedbugs and kissing bugs, blackflies and botflies, lice, leeches, ticks, and scabies mites, which tunnel across the backs of an afflicted person's hands like moles burrowing in the front lawn.