No longer limited by the constrains of their environment or biology, humans have remade their world. Why walk when you can soar? Why shout when you can whisper in the ear of a listener halfway round the world? And why limit yourself to normal stimuli when you can condense the sensory world into nuggets of superstimuli. Join Robert and Julie in this classic episode as they discuss junk food, gaming, pornography, the Internet and beauty itself all in the framework of natural biology.