"Turn-ons: The color green and sports cars. Turn-offs: Women drivers.” 

Those were the  stated turn-ons and turn-offs for Linda Gamble, Playboy’s Playmate of the Year, 1961. Oh, how we love turn-ons and turn-offs -- as much a must-read as the centerfold was a must-see. It was fun to wonder how you would answer the question, and to wonder what constitutes a turn-on or a turn-off, anyway? People’s likes and dislikes are marvelously capricious, but when it comes to actual sexual turn-ons or attractions, your brain is reacting to stimuli and sending out signals that you might not be aware of, shaping your reactions and choices. From certain sounds to actual physical changes that could alter your sexual self in bizarre ways, here are 10 ways your brain might be controlling the on/off switch for your attractions.