Seeing how I am reading this page I obviously know a male carrier.  Having just discussed this with our endo I can tell you my husband began shaving in the 8th grade. Seems kind of early to me... I am not an expert though. I just remember my brothers not shaving until well into high school. They are not carriers to our knowledge. One has been tested thus far. My husband never (unfortunately) had big growth spurt and today he is 5’9". His family are not tall people. They are hairy though!  :)

Hope that helps at all??