You're younger, you might want to go to clubs and kick it, but as you get older, you start seeing that life has more meaning to it. The people that you love are the people you want to start trusting and start wanting them to trust you and start respecting them.
Civilization is so hard on the body that some have called it a disease, despite the arts that keep puny bodies alive to a greater average age, and our greater protection from contagious and germ diseases.