All good guesses! I sure was surprised to see what was revealed when he, upon my request, tipped his hat.
The boy had a very large and thick pillow of dark brown wavy hair. Pillow, because it was. Just sitting on top of his head. A big PUFF of hair. I couldn't help but laugh. He was a great sport.
The outline was a real and very thin line of hair growth. Pretty tedious to do, doncha think?
You were all right to some extent, thanks for playing!
Never seen this particular dooooo, before, and I was dooooooly impressed.
Groan. Sorry, couldn't help myself.