Why would you want to be sensible when being stupid is so much fun?
Everyone always says it's time to be sensible: "Put down the fire extinguisher, put your clothes back on, and get off my bus" That's bullshit. There's always time to be sensible when you're old and decrepit. When your knees and your mind are incapable of any more mischief.
Until then you owe it to yourself to be stupid. Before you forget how.