can you please tell me from when you noticed that your friends changed from a girl to women and a boy to a man

mine was when i was when about 14 years old and i was getting changed in the locker room when a friend walked out from having a shower ( i never saw him going in ) he wasnt wearing a towel and he was shining because of the water droplets on his body i have got to say my eyes did drop to the lower part of his body and what a cock he had it was large ,cut and he had a big knob and it was framed by black bushy hair i must say i watch him return to where he was sitting as im sure a few other guys did

my body hadnt changed( like the rest of the guys in that room ) and i still was waiting for my cock to have hair that is why this memory will stay with me and i can still see the playback in my minds eye