http://www.norwichunion.com/health/health-news/news-story.cgi?id=1141220299&c=430016192 For evidence seekers, for what is there that we know? The above link, to Shiv and others who may be interested to know more about it. By, the way the estrogen (which is again a product of Testosterone, the main male androgen), is not only related to breast cancer but to several other sex physiology implications. Besides that, concerns for air polutants and artificial smells can compromise the nasal sensibity to pheromones that initiate the early process of cascade events that ends in ejaculations. Having said that, repulsive smell will deny onself a potential mate, but overlacing with deodorants to mask the real source of foul smell will also not come free to the health, a bill one will have to pay as with aging. In a prelimenary reporting "it says adolscents with early start in use of chemicals and deodorants ends up with more chances of acne peppered body and other endocrine disturbances (don't quote me here, the findings was a survey study associated with city kids and their night lives in various big cities accross Asia).