"Sexsomnia" sounds like a made-up, weird word, but this appears to be a sleep disorder. While doing research for a recent TV appearance , I investigated what looked like a new and intriguing parasomnia.
In an editorial about sleep violence, a man chronicles what it's like to commit violent acts in his sleep (granted, his didn't go much further than punching the headboard or acting like a defensive lineman).
I still get amused by people who think sleep is a state of nothingness. Sleep is a break from busy wakefulness for the body's, but there's a lot going on in the brain making sleep far from a state of inactivity.
Lost melatonin is just the tip of the iceberg for the sleep deprived. It is all the other hormonal shifts resting on the melatonin "timer" that change appetite, fertility, and mental and cardiac health that will kill you.