Dan Gilbert's TED Talk does a great job demonstrating this (http://www.ted.com/talks/dan_gilbert_asks_why_are_we_happy.html http://www.ted.com/talks/dan_gilbert

Dan Gilbert's TED Talk does a great job demonstrating this (http://www.ted.com/talks/dan_gilbert_asks_why_are_we_happy.html http://www.ted.com/talks/dan_gilbert_asks_why_are_we_happy.h...).