From Wikipedia (link):
TENS Electrodes should never be placed:
- On or near the eyes
 - In the mouth
 - Transcerebrally (on each temple)
 - On the front of the neck (due to the risk of acute hypotension through a vasovagal reflex)
 
Somebody is obviously placing art before safety.
			
			
		
“Justin, dad warned you not to play with his TENS unit! Look at how your face has changed!”
Seriously, I wonder why this guy didn’t take off his glasses?
Please send link to dad so he can forward it to his TENS friends!