Yesterday on the subway, crowded.

A woman sat on my left, talked with her lover who stood there, looked around and nearly no feedback to the woman, but the woman was still dash along. She really loved her boyfriend.

Someone on my right side stood and went off, the man sat down and still cool. So the couple were on my both sides. From my experience, I knew they would begin a "private conversation" across me, with some spittle on my face. So I said to the man: "Hey, shall we exchange." The man shake his head, but the woman smiled and stood up:"I exchange with you." Then I began to move.

At the time I moved to the woman's seat, I found something strange that made light reflected. I lowered my head and stared at it really carefully.

The seat, which the woman sat on,  was already wet.