Thank you for all the great responses!
Answer: Trick Question! Popcorn and Gummy Candies are, respectively, Venom and Carnage, to floss' Spiderman. Popcorn and Gummy Candies are two of the worst villians known to mouth, wreaking havoc on the spaces between teeth. That's why we have floss - your mouth's friendly neighborhood superhero.
Until next time, floss on, bros!