Here are some observations about life as a male, from an old guy -- me. I am no longer young, I'm old, and I sorely miss the strength, endurance and "immortality" of my youth.
A famous playwright, George Bernard Shaw, said that "youth is wasted on the young". He was right.
Here are some other things that are wasted on young males:
Hair is wasted on the young
That's what toupees are for. Or baldness. Or hats.
Teeth are wasted on the young
That's what dentures are for.
Erections are wasted on the young
That's what viagra is for.