All attachments will end in sorrow. Neither tears nor long good-byes can end the transitoriness of life. All compounded things are impermanent. Old and young suffer in this existence. No one is exempted.
Many teenagers have growing pains.
Being neither frogs nor tadpoles, teenagers are understandably inexperienced at building stable relationships with members of the opposite sex. They try to show off their beauty in trying to impress their opposite sex who are flattered to see themselves as sex objects. Both try to behave not as they really are but as what they think is adult. They are afraid that if they behave naturally they will be laughed at. Behavior like this has the potential for exploitation.