http://www.foxnews.com/story/0,2933,167124,00.html
The real reason to post is perineum, anus, penis and scrotum.Erectile dysfunction and bicycling are the topics of three new studies in The Journal of Sexual Medicine.
The studies show that when erectile dysfunction is related to bicycling, it's linked to pressure on the perineum (the area between the anus and scrotum where nerves and arteries pass). The pressure, which comes from sitting on a bicycle seat with a nose extension, restricts blood flow to the penis, write the researchers.