As a...stalker that broke into his room at night when he was asleep? Did you use permanent marker by mistake?
IT DOESN'T WORK! ALL THOSE TV SHOWS AND MANGA ARE LYING!! People wake up super easily when you try to draw on their face........
I have drawn entire landscapes on my uncle's back, multiple times. And then helped him wash it as well. Face, I don't remember drawing, but I remember wanting to.