Please have some consideration for other, would you? You are licking a knife in the public. Now, if I'm a normal person then I will very worried about the person licking a dirty knife that might cut his tongue in half because he doesn't possess enough brain power to know that he is licking at the sharper end of the knife. So please, I'm banning you for the good of you. And for many small children from doing the same thing. Have a nice day.
(P.S: Please don't take this seriously, I'm only joking. If you are feeling hurt because of what I said then I'm sorry. If you wish to stop then just say so, I will stop this immediately.)