Please review and study the photographical evidence below used to support our claim:
Evidence #1:

Evidence #2:

Evidence #3:

Evidence #4:

Evidence #5:

Shia LaResourceful
Observe closely and take note of where the headphones are being held on Shia's body.
As Shia walks, the headphones sway. His mouth has an apparent tight grasp on the headphones much like a hand would.
It appears Shia has pockets that could also be used to hold his headphones YET he still opts to use his mouth as a third hand.
Take note of how Shia chooses to ignore the fact he has two functioning hands that could support the weight of headphones.
With a closer look, his facial expression indicates no shame in using his mouth as a third hand — this was clearly intentional.