Myths about virginity don't exist solely because of misinformation about the hymen, however, and that's because the concept of virginity existed long before the hymen was even identified. First acknowledged in the 16th century by anatomist Andreas Vesalius, the hymen, historically speaking, is a relatively new discovery; social and cultural ideas about virginity, on the other hand, have been building on thousands and thousands of years of history.
One popular explanation, called the K-Strategist Theory, suggests men used virginity to help determine paternity—a way to make sure the material resources they devoted to new or expectant mothers weren’t wasteful investments.
http://www.theatlantic.com/health/archive/2014/02/living-myths-about-virginity/283628/



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