CNBC - Sep 14 - Apple introduced its first smartwatch on Tuesday. "Apple Watch is the most personal device we've ever created," said CEO Tim Cook. "It's an intimate way to connect and communicate." The Apple Watch has what the company calls the "Taptic Engine", the watch's ability to produce a slight tap on your wrist. This can be used for notifications from apps, but users can also tap other people. It's not hard to imagine the amount of tapping that might take place between two teenage lovebirds equipped with the devices.