I just watch a documentary video on TV, which investigate what and how do people sleepwalk. One of the sleep walkers is 'sexsomnia', which I don't feel it's weird at all. But this 'sleep artist, Lee Hadwin, is definitely a weird case. His works are basically challenging Jackson Pollock's Abstract Expressionalism, as well as critiquing the idea of unconscious painting.
http://www.leehadwin.com/