Could picking your nose and eating it actually be good for you? the University of Saskatchewan professor likes to ask his students. Perhaps it’s just a way for your immune system to sample the pathogens that surround a person every day. Snot has a sugary taste, according to Napper (an assertion I can’t bring myself to prove or disprove) which might be the body’s way of saying “Eat this, all of you, and learn from it.”

“I’ve got two beautiful daughters and they spend an amazing amount of time with their fingers up their nose,” he told CBC News. “And without fail, it goes right into their mouth afterwards. Could they just be fulfilling what we’re truly meant to do?” …

“All you would need is a group of volunteers,” Napper said. “You would put some sort of molecule in all their noses, and for half of the group they would go about their normal business and for the other half of the group, they would pick their nose and eat it. Then you could look for immune responses against that molecule and if they’re higher in the booger-eaters, then that would validate the idea.”