>>11561345I don't know, some subconscious mechanism to remind you that youve got some shit pointed near your face.
When I was a wee lad in elementary school I used to point a pencil at the bridge of my nose between my brows and got a weird tingle. Can't say for sure if its the same feeling, and I don't get it any more as an adult, but its the closest I can get to your predicament.