When I was 17 on the way home from Charleswood there was a couple on the back of the bus. He was sitting comfortably with his arm around her. She was sucking his thumb endlessly as he looked on, indifferent. I couldn't help but look sometimes because it just went on for minutes. At one point she and I just locked eyes for about ten seconds as she continued to suck his thumb. He still didn't react and was oblivious to it. They eventually got off (the bus) and I just sat there, taken aback by the display of affection I unintentionally became a part of.