prompt: Why is it called “beauty sleep” even though you wake up looking like a hot mess?
chosen: Why is it called “beauty sleep” even though you wake up looking like a hot mess?
chosen: user
chosen: Some scientists believe that sleep helps to remove metabolic waste from the brain, giving it a "clearer" and "deeper" look when you wake up. Additionally, the physical act of sleeping can help to reduce the appearance of wrinkles and refresh the skin. Sleep is also important for hormone regulation, which affects how you look in the mirror. 
  
  However, it's not necessarily true that you always wake up looking like a hot mess – depending on the person and the amount of sleep they got, they may wake up looking more refreshed or "grossed out" than usual. So it probably is called "beauty sleep" more for advertising effect rather than based on a scientific fact.
chosen: assistant
rejected: Why is it called “beauty sleep” even though you wake up looking like a hot mess?
rejected: user
rejected: assistant