A woman, aging, grey hair cropped short, stands at the back. 

 For a moment she is uncertain, but then she watches the other woman, and something tugs at the corner of her lips. She steps toward the table, keen brown eyes skimming across the array of objects, before they fall on a thick, black sharpie. She picks it up.

 She approaches the volunteer, sure footed, then carefully, she slips the button at his collar free. Her throat catches as it slips open, revealing the slight bob of his neck as he breathes. More confident, she undoes the rest of the buttons until the shirt hangs, exposing the volunteer's bare chest. 

 She uncaps the sharpie, and hunches over, her body hiding the drawing from view as she works. 

 She stands, slips the cap back on with a sharp [i]click[/i], before moving out of the way to reveal a giant, hairy set of balls covering each pec, accompanied by a wrinkled trunk that sits between them and snakes down his belly.

 She returns the sharpie to the table, task completed.