Have you ever had insomnia? I sometimes get it for a few nights in a row and spend many sleepless hours tossing around in bed, looking at the clock and listening to all the night sounds that go on in my neighbourhood. The next day I drag my tired self through the workday and walk around like a zombie drinking buckets of coffee. Loading up on water sometimes perks up the body but only for a short while. Then all of a sudden one night you reach your limit and fall asleep on the couch. After a few hours you drag yourself to bed and sleep without moving until the alarm clock goes off in the morning. Then you hit the snooze button and get nine minutes of the deepest sleep you've ever had. I love the nine minute snooze sleep. Insomnia over - back to your normal routine. Life is great when you are well rested.
Life is even better when the weekend comes and you can take siestas in the afternoon.