Such a mind f*ck.

This upsets me.

Thanks.
I mean that both sarcastically and sincerely because I'm completely confused about how this new knowlegde makes me feel.

Unless you hold your bottom jaw in place and bite with your entire head.

MIND FUCK

I actually sat here opening and closing my jaw...just to check

DONT DO THIS TO ME!!!

In that case..we only have a lower Jaw...
if Movement of Upper Jaw is counted as movement of entire head !!

Yes you can, by moving your head.

I think it's because you bite with your top teeth down first.

I know I'm not the only one who tried this.....

I HAD A BOYFRIEND WHO WOULD ALWAYS SAY 'SHUT DOWN' INSTEAD OF 'SHUT UP' AND WHENEVER I'D BE LIKE 'SHUT UP' TO HIM HE'D JUST REPLY WITH 'SHUT DOWN' AND I COULDN'T TELL HIM TO SHUT UP BECAUSE IT WOULD JUST CONTINUE LIKE THE VICIOUS CYCLE IT WOULD BE LIKE NO, ANDREW, IT'S SHUT UP AND IT CAN'T BE SHUT DOWN BECAUSE YOUR LOWER JAW MOVES UP WHEN YOU TALK DO YOU MOVE THE ENTIRE MOTHERFUCKING TOP OF YOUR HEAD OR JUST YOUR JAW GODDAMMIT ANDREW IT'S FUCKING SHUT UP AND YOU NEED TO FUCKING SHUT UP IT'S NOT QUIRKY OR COOL IT'S FUCKING STUPID

I always make sure to hold my lower jaw in place and move my entire neck when I eat.