You can be allergic to something you ate.
i think... probably you lick your own tongue. but i hope you're not lick ing anyone else's
who cares why do you need to know
yes and it depends on the relationship but if he/she kiss you in her tongue it means she/he like you deeper than friends or depends on your standing
you can. you can also lick a car, but it won't make it drive...
L.A. Noire Slip Of the Tongue Trailer
The Cause of a Black Tongue
Treating Tongue-Tied Newborns
How to Treat a Burned Tongue