When Eva first held the device, she didn't expect that it would change the world, only her marriage. It was a turquoise square that attached to the forehead. She had one for Brian and another for herself. The copy on the cardboard box called it an empathy enhancer, used in psychiatric counseling and in a few notable court cases to link together the minds of the subjects, allowing them to share thoughts and emotions. Eva put it on, and when she stared into Brian's eyes, she saw herself. She smiled.
Before long, they never took it off. An attachment allowed them to communicate at a distance, and it was so useful that Brian always knew what to bring home from the market. When Brian's mother complained that he never called, they hooked her up as well, and in a stroke Eva knew how to knit and make Brian's favorite dish.
Concerned that such extended use might be harmful, the designers of the device came to see them, but these doubts vanished as they too joined the community. They rushed off to the lab to make more squares, and Eva smiled because she could see the future, and it was turquoise.