so our limbic brain's involved in our mood, how happy or sad we are. it sets our emotional tone, how positive or negative we are. it's involved with bonding, our ability to connect to other people. it's also involved in processing pain. it processes your sense of smell and your interest in sex, or your libido. isn't that interesting that smells and sex go hand-in-hand? the whole perfume industry is based on that fact. now, i already talked about baby powder, as a powerful aphrodisiac for women, but did you know that cinnamon is a powerful aphrodisiac for men? and when i told my mother this, she hit her forehead, and she said, "that's why she hit her forehead, and she said, "that's why i have seven children." [laughter] >> he would never leave me alone. being lebanese, she cooks with a lot being lebanese, she cooks with a lot of cinnamon. [laughter] >> now, when there are problems in this part of the brain, usually when it works too hard, people become sad and depressed, negative. they often feel hopeless or helpless. they are racked with guilt. they ha