Its is Impossible for you to be able to lick your elbows, well except you have an incredible tongue or you if you are decapitated lol
There is an urban legend about not being able to kiss or lick your own elbow, that if you do, will turn to the opposite sex.. this always gets me laughing hard, did you believe that?
Can you try and see if you could lick or kiss your elbow and let me know? lol.