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2. Heavier men last longer in bed...

Put down the weights and grab a hamburger: Researchers in Turkey have finished a yearlong study that correlated body mass index with male sexual performance. Their findings may surprise you: Heavier men were able to make love for an average of 7.3 minutes, while slender men lasted an average of 108 seconds. The study, published in Nature, showed that overweight men had higher levels of the female estradiol hormone, which blocks male hormones and delays the climax.