Kooky woman

"Can I tell you a disgusting story?" I heard her ask the man behind me. "Of course." He said. I assumed they knew each other and laughed as she told the story. She tapped me on the shoulder and said "you think I'm crazy don't you?" I laughed and I said, "no, just bringing joy to the morning." She laughed and so did the guy she had been talking to. And then she exited the train. Apparently she was just a friendly person.