yes everybody does it in the morning as well as before going to bed. it is quite obvious, however exceptions are always there.
One should brush his teeth before going to bed. Regular usage of the brushing your teeth keeps the 70-100 diseases away from you. Its the sayings of last prophet Muhammad Peace Be Upon Him.
Just started brusing my teeth at night around two years ago. But I havent really been able to get into a habbit and do it everyday. I probably brush 50% of the times at nights..
Try to floss at least once a day, since most adult cavities occur between teeth. The most important time to floss is before going to bed. Floss before or after you brush'either is fine. Guide the floss between the teeth and use it to gently rub the side of each tooth.