Man Licking Shoes on New York Subway

Now that's not exactly how I spit shine my shoes but to each his own. I thought it was common knowledge that you lick from back to front. This guy appears to lick them from front to back. With that being said, they do have a helluva shine when he's done. Maybe he is the master and I am the student. Thank you crazy-subway-shoe-licking-guy.

p.s. How about the guy in the green jacket. Doesn't bat an eye. Probably sees this kind of stuff on the subway every day...