After a long and tiring day, a commuter settled down in his seat and closed his eyes.

As the train rolled out of the station, a woman sitting next to him pulled out her mobile phone.
She started talking in a loud voice: "His sweetheart. It's Sue. I'm on the train. Yes, I know it's six thirty and not four thirty, but I had a long meeting. No, honey, not with that Kevin from the accounting office. It was with the boss. No sweetheart, you're the only one in my life. Yes, I'm sure, cross my heart!"
Fifteen minutes later, she was still talking loudly. When the man sitting next to her had had enough, he leaned over and said into the phone. "Sue, hang up the phone and come back to bed."
Sue doesn't use her mobile in public any longer.