Could testosterone be a factor? http://healthland.time.com/2011/09/13/why-do-dads-have-lower-levels-of-testosterone/ http://healthland.time.com/2011/09/13/why-

Could testosterone be a factor? http://healthland.time.com/2011/09/13/why-do-dads-have-lower-levels-of-testosterone/ http://healthland.time.com/2011/09/13/why-do-dads-have-lower...