Episode 3: Why is sex fun?
Sexual pleasure is among the most prized, most meaningful and richest experiences known to man. But the orgasm is a true scientific puzzle. In men, it helps expel sperm. But in women, its role is unknown. Some feel it's just a "bonus" but others think that it may help play a role in conception. Maggie Gyllenhaal hosts this revealing investigation -- a true scientific first.
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We like to think we're in control of how we express our emotions, but much of our nonverbal communication is done unconsciously, and it's a language all humans understand. So how do we use nonverbal signals to communicate and interpret emotions?
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