Attack of the orificeman

On the subway the other day, on me way to a client, just sitting engrossed in my book ("A Fine Balance" by Rohinton Mistry, which is brilliant, btw), when we stopped at Ebisu station. This slightly scruffy looking man comes bounding onto the train, sports bag slung over his shoulder, and almost runs to sit next to me. Quickly gets up again, shunts his back up onto the rack above and then sits back down, in a kinda sprawling manner, legs apart, feet pointed outwards. He then proceeded to use his right index finger to literally drill into every nook and cranny on his body, starting with some deep digging of his nostrils. I thought at first he'd just spend a couple of seconds at it, but he continued for two stops! First the nose, where he'd excavate some sludge and bring it forth into daylight, give it a good examination before plunging back in, wiping any treasures off on his trousers. Next ears, which must have burst an eardrum, seeing how deep he was going. Then onto the gaps between his toes. Yup, shoes came off, and socks, and it was time for the rummage between toes game. This time, he was actually smelling his finger each time, which almost made me puke. Finally, he finished with some scratching under his armpits and then some manic rustling of his hair, before settling down into a deep sleep.
Throughout this little adventure over the contours of his body, nobody else would look at him. It left me slightly flabbergasted and feeling ill, as I hurried off the train.