Corn is actually digestible, what youre seeing when you poop is the outer shell of the corn

In reply to this comment by Morganth:
Plenty of food or other in-edibles that your body can't digest just go through. Gum, just like chunks of corn, passes right through and does not stay partying in your stomach for seven years. Though I think you can digest gummy worms (not certain though), even if you can't, it would still go on through.