I was researching for prolapsed........male organs.... and came across this link. I thought it was pretty fascinating, and would be curious to know about more speculation on the how's and why's..
http://www.abc.net.au/science/news/enviro/EnviroRepublish_366856.htm
http://www.abc.net.au/science/news/enviro/EnviroRepublish_366856.htm