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Cityfile has partnered with Dr. Helen Fisher to bring you the latest insight into love and romantic attraction. A renowned biological anthropologist, Dr. Fisher has conducted extensive research in the fields of human sexuality, love and marriage. She serves as Chief Scientific Advisor for the internet dating site Chemistry.com.

Question: Before I renew my gym membership, tell me if muscles on men really matter when it comes to dating.

Answer: The truth is women don't really like muscled men. This has been demonstrated scientifically, in fact.

In a series of experiments, it became clear that women are attracted to buff men for short liaisons and affairs. But for a long term relationship, they seek more average looking guys. Why? Well, women report that very muscular men tend to be domineering, volatile and cheat more often on average. For a long term relationship, they prefer men who are more faithful. What's so interesting about this is that these women are accurately (yet unconsciously) reading biology.

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Bodybuilding triggers the production of testosterone and elevated testosterone is associated with being domineering, volatile, and unfaithful. So looks do count. They say subtle things about your biology and your personality. And people naturally pick up on these cues. So don't think you're shallow as you ogle people the next time on the beach. Listen to your heart. You're often much smarter than you think you are.

Visit Chemistry.com today to complete your free personality test and get your first chemistry inspired matches FREE!