A dramatic increase in height and muscle mass typically begins between ages 11 and 15.
Examining the in European sexual education from that era. Sexuele voorlichting (Video 1991) - IMDb A dramatic increase in height and muscle mass
So here’s the real voorlichting: Your body will change. That’s fine. Your feelings will confuse you. That’s also fine. And the romantic storylines you cling to? They’re not silly. They’re your heart’s way of asking, “How do I do this?” “How do I do this?”