Third,Sleeping habits, often late at night when the body is balanced and will eventually if not reduce late or canceled, each sleeping habits, sleeping late into the habit. One day you may see a gap before the age when compared to same-age friend that a good night's sleep enough.
Third,When a behavior often stay up late. Our bodies would upset the balance in the end. And if not avoidance behavior, sleep or sleep habit already. One day you may look older when compared with the same age who sleep enough rest.