Run, Joseph! Run!
Okay, granted, this painting is supposed to be before the Nativity - or, that's what my source says, anyway. And I suppose a man could look that tired while sleeping if he were only worried about the fact that his obviously virtuous betrothed had gotten pregnant and he couldn't figure out what was going on. I mean, I suppose it could make a man look that harried. But I want to ask Georges Dumesnil de La Tour if it was supposed to be the angel's visit after the Nativity - the one that said, "gather up the mother and child, and run, Joseph! Run!" I think he looks like a man who's been up several times a night with a baby. De La Tour died in 1652, though. So I'll have to wait.