~Young and Stupid~

We all have our days when we are/were young, we care very less about the other things and focus more on our personal desires and happiness.
The world has their so called terms and definitions about being young and having a fulfilled life, they say do whatever you want, and do what makes you happy. Choose and decide what you want out of your life.
When do we become young and stupid?? and start doing each and everything for our own benefit and pleasure instead for someone else.