"...The historical record is not good enough to determine if eunuchs tend to outlive normal healthy men, but some sad records suggest that they do. A number of years ago castration of men in institutions for the mentally disturbed was surprisingly commonplace. In one study of several hundred men at an unnamed institution in Kansas, the castrated men were found to live on average 14 years longer than their uncastrated fellows..."
http://www.scientificamerican.com/article.cfm?id=why-women-live-longer
http://www.scientificamerican.com/article.cfm?id=why-women-live-longer
