For many of us, being apart from our phones is almost enough to cause a panic attack. The "funeral selfie" Instagram, for instance, is the ultimate testament to just how attached people are to using their mobile devices at all times. Is there such a thing as an appropriate and inappropriate time and place to use our phones? For example, when and where is text messaging appropriate, and how are people's views on cell phone etiquette changing? What else can we learn about human behavior through a closer look at these small devices?