don't be in denial
people who say 'mind over matter' and etc are in denial that there is a problem. its a no brainer - you're taking a medication which suppresses the production of a major male hormone. most men lose hair. this medication stops this in many (if not most) men. so, do you really think that a medication, which is designed to block male hormones, which is so powerful that it will stop a natural process like hairloss in most men will not stop other 'natural processes'? anyway, the research is already out - propecia causes erectile dysfunction. its not in your head. thats a fact. now you take this medication at your own peril.