"That Armpit Odor Says a Lot About Who You Are"

"That microbes are actually the makers of mammalian pheromones is an idea that dates back to the 1970s when several scientists proposed the "fermentation hypothesis." Their idea was that, because scent glands are typically found in warm, damp, low-oxygen areas of the body, microbes that thrive in those areas ferment the body's nutrient-rich secretions into the odorous chemical signals used by most mammals to communicate."

"The fermentation hypothesis has been difficult to test in any definitive way, until recently."

Pacific Standard via Instapundit