I work nights, and to be up during the day on my off days I often pull all-nighters to start my weekend. I've lost the ability to make up sleep WHEN I WANT TO. Instead of sleeping in all of Friday, which I want to, I'll stay in bed for no more than 12 hours and then it's apparent I won't be able to sleep anymore no matter how much I try. Then when I go to bed again I want to sleep like 12 hours but instead it turns into like fucking 36.