Blue, you are only 19 ! No wonder you don't get the joke.
the boy is crying because he can't do the activitied that older boys do. ie: big game sports, ride motorcycles, dangerous sports.
The oldman is crying because at his age sexual functions don't function so good anymore. The big boys the little boy was talking about have no problem in that function. ( When you get older, someday, you too will understand.)
19 ! gawd, the age where you know it all. You're going to learn a lot in the next 6 years!
