My jaw is sore as FRIG, and I legit think it’s from eating too many sunflower seeds.
It’s really only to satisfy my oral fixation–and the intense love of salt that will one day lead to my death–so when I sunflower, I do it up big. Pop 10-15 of those fuckers in one cheek, crack them in the center of my mouth, move the cracked seeds to the other cheek, spit the shell, continue until all seeds are shelled, eat them all at once.
Thing is, this takes a lot of tongue coordination and muscle use. But it’s addictive as fuck for me, because it satisfies that weird urge to be “accomplishing something” without having to do anything hard.