Sleep is one of the vital activities that keeps us alive. Like breathing does.
Some people claim that sleeping 2 times a day is the best rhythm to keep us going<, I would love to try it but haven't been able because of the office life.

After I started to practice yoga and fell asleep in my shavasana some times and didn't mind lying on the floor anymore, I began sleeping on the floor and it has brought many benefits. My back feels a lot healthier these days.