The Bus Tunnel

I took the bus tunnel from work to the heart of downtown yesterday so I could quickly do some shopping before meeting up with Logic and Daniel. My office is where the tunnel starts so the bus was empty when I got on. At the next stop a man got on, dragging a bag full of his life's belongings. He looked like he hadn't showered in a very long time and may not have even known where he was at. He chose a seat in the middle of the bus that is elevated and facing inward. I had a clear view of him.
I tried to close my eyes because I didn't want to be rude but I kept finding myself peering through a squinted eye - just to see what he was doing. At one point, my eyes had been closed for a while and as I slowly opened them - almost forgetting he was there - I saw him licking his finger and then wiping the arm rest and then licking his finger again. It's as if he were testing it to see what it tasted like.
It was at that moment that I made a conscious decision to NEVER, under any circumstances, touch anything on a bus ever again.