What's Sexy?Whats Sexy? measures the intricate inner workings of lovers in love, as well as lovers that stray, and dares to suggest that we are a lot less in control of love than we may think. You'll see what can transform the ecstasy of love into a cocaine-like addiction and you'll learn what draws men to women and whether a "family guy" or a "hunky action hero" is more of a natural match.

If you ever wondered what it is that makes men go ga-ga over female curves, or why women swoon over a masculine face, National Geographic has come up with the series to examine the science of love. That doyen of documentary-makers has upped the ante to give the low-down on love, tracking what it is that make men and women attracted to each other.

Sniff out a potential mate? Look out for signs of the perfect one? You will be surprised to find out your physical senses are very much involved in tracking down your significant other. This may help to explain why some people "click" from the first moment of attraction, and what helps them to decide to bond with that special man or woman to settle down and raise a family.

Suddenly, the phrase "love at first sight" takes on a whole new meaning. In the series, the game of attraction is examined with a scientific eye. Researchers with impressive-sounding resumes who have made it their life's purpose to study the game of love produce results from brain scans and sniff tests to tell you the difference between lust and love.

And you can be certain that all the information you have just heard is no hocus-pocus. After all, the good people at National Geographic guarantee that the facts which are presented are verified by their fact-checkers, before it goes on air. The series is worth watching for its invaluable nuggets on what makes us tick when love, or lust, calls.

Watch the full documentary now