Transcript: What’s your biggest sex organ? Yeah, not that. It’s between your ears, not your thighs. Sure you feel an orgasm between your legs, but those sensations are actually due to chemical changes in a part of your brain called the limbic system. As you build toward an orgasm, the limbic system releases more and more of a chemical called dopamine. Orgasm provides the biggest blast of dopamine legally available to humans, resulting in highs equivalent to a heroin rush. But if your brain has been feeling a bit left out lately, don’t worry, you CAN kick-start dopamine production. Try talking to your partner about your sexual fantasies, or adding props to your sex play. You can also bring erotic literature or pornographic videos into the bedroom. Get your brain in on the action and get ready for your hottest sex yet!