Others, like my friend Chris, see a canvas.
One day at Burning Man, Chris looked at me and abruptly seized a package of water-based markers. "Hold still," he bade me, and since I'm used to him ordering me around I held still while he drew on my head.
He enjoyed it so much, he repeated this action the following evening, improvising a more elaborate, quasi-mystical design on my face and scalp. This time, I reciprocated by drawing mysterious designs on his chest.
This inspired a notion I might propose the next time I go to Burning Man. It might be nice to go to the family camp area, take a seat, and let the children paint my head with fingerpaints.