"Huh? Oh- yeah, it's like biting tinfoil, right?"

"Oh, of course.  Right.  That makes sense."  He has never once in his life considered biting into tinfoil.  What would that even..?

Timothy has a list, so he will follow the list.  Kitchen: Entered.  Tinfoil: Acquired.  Tiny piece of tinfoil: ripped off.

Let's do this.

Biting tinfoil (with a smidgen of durability in case it breaks his teeth) feels like nothing.  Huh.  What's the problem?  It's flat against his teeth, and it biting between his canines reveals absolutely nothing unpleasant.

Okay.  Well.  This is overrated.  Tim feels a bit stupid, but maybe moving it to a back tooth will change something?

Chomp, and an edge of tinfoil is caught.  Where before, Timothy was biting flat tinfoil, now he's folding it with his teeth.  This yields and unpleasant popping/crunching/augh sensation which prompts a grossed-out face.  Ew.  Okay, that feels bad and sounds worse.  Bleah.

Spit out the tinfoil, and onto the next action item.