The trillions of dollars generated annually by the tech industry appears to have not bought any inner peace to the guilt-ridden executives of Silicon Valley. The heads of the largest tech companies have sought solace at Esalen Institute, a nonprofit spiritual retreat where visitors do yoga and meditation exercises, eat organic food, and learn about tantric sex. And, if that wasn't enough, they also sit around naked for hours at a time to try and discover their inner-selves.