You have enemies? Good. That means you've stood up for something, sometime in your life.
“The sensors have many potential practical uses - in Government buildings, train carriages, cargo containers, on a soldier's lapel - and are a thousand times cheaper than current sensors that are used for the same purpose.”
“However, further research has shown that it is the normal condition for humans and for most other mammals. It seems pretty clear why this is the case for most mammals and for most human beings.”