You know those really anxious nightmares you've had at one time or another where you dream you're at school, or work, or some other public place, and you discover you're naked? That level of anxiety is nothing compared to the combination of phantom sensation and psychological defenselessness experienced by the average disembodied head. A good nano-fluid bottle can mask some of the pain, but for most folks unfortunate enough to spend time in one of these cans, the prospect of meeting an employer, a teacher, or the object of one's unrequited physical attraction while in this condition is enough to make their body roll over in its grave (or wherever it might be at the time. You don't end up with your head in here if you did a good job of keeping track of it.)