Self: The “revenge” part comes in if you’re staying up out of frustration because work and other responsibilities have encroached on your time.

There’s nothing wrong with needing a little me time at the end of the day, but the danger is that your evening self is stealing from your morning self, Dr. Dasgupta explains. “I have zero problems with people wanting to take some of their lives back,” he says, but he adds that doing so at the expense of your sleep isn’t ideal.