Saw this on google, "The person who sleepwalks will appear to be awake but they're really not. And we know this from monitoring their brainwaves," he says.
It's the parts of the brain controlling vision, movement and emotion that appear to be awake, says Guy Leschziner. "While areas of the brain involved in memory, decision-making and rational thinking appear to remain in deep sleep. So people in this state can talk, walk, eat, cook, drive or even have sex, without clear consciousness or memory."
I think we can safely assume that they can also open their eyes.
dang you did your homework, thanks mate
ITS REAL?!?!?????? WHAT
This is actually scary if you have it
Does the person with sexsomnia open their eyes though?