When I said "evidence" I meant peer-reviewed scientific papers. Not the whole thing, an abstract will do. Wikipedia most certainly will not.

I'd also like to see evidence that increased levels of testosterone are advantageous to evolution. My view on it was that increased testosterone levels are dangerous in a potential partner and father as they cause aggression and irrationality, and are thus an undesirable trait in a potential mate.

Here's my evidence for that:

http://www.psychosomaticmedicine.org...tract/50/3/261

http://endo.endojournals.org/cgi/con...endo;145/2/790