As told by an Inflight Crewmember:
I was sitting on one of our flights between FLL & JFK. The Customer next to me had been pushing the TV control buttons on her armrest for a while. I figured she was just trying to find something interesting to watch. After a while, the cute little lady pushed the flight attendant button for assistance. The flight attendant asked the Customer what he could help her with. She proceeded to tell him that the volume on her TV was not working. The flight attendant looked at the woman and remarked, “Well, you don’t have any headphones on”. She acted a little confused and embarrassed. I offered her my extra set of headphones, which she gladly accepted.