Through my biology classes in school, I learned that during the adolescent years, hormone levels can fluctuate greatly.
Are you kidding me? My hormones and libido in my adolescence stayed very high all the time, no fluctuation. And if my male friends were telling the truth, they too were horny all the time. Today, at 52, I may have to make a mental effort to get aroused, but back in my teen years no mental efforts got it down. I had to use physical violence to get it down.