Virginity is considered a virtue, usually only girls, however, and usually only from the viewpoint of her parents and sometimes other guys (who don't want her to be a virgin before he meets her, but not after). Some parents, understandably, value virginity because it means that their daughter (or sometimes son) isn't out losing her innocence and not becoming a "hoe" or whatever, but virginity is rarely a measure of innocence. Innocence, not naivety, can be legitimately considered a valuable trait. The kind of innocence I'm talking about is being free from sin, moral wrong, guilt, deceit, desensitization, or the inability to love. Innocence can also mean naiveté, but that has a bad connotation and isn't part of what I'm discussing. There’s nothing wrong with a girl who no longer has her virginity, because that is not a if and only if indicator that she has lost her innocence. By the same token, a girl who retains her virginity may not be innocent. Compatible personality, ability to love, universal kindness, strategic honesty, proud humility, and realistic optimism are what I consider the most important virtues a woman could retain. If, by the time one gets married, neither partner has ever had sex then they are almost certain to be naïve, not innocent. Sex, like anything in life, is done for user reward. Be it consummation of love, exchange for social power, sold for money or other monetary gain, mental dominion over another, or merely biological fulfillment or personal pleasure. Of course, having sex explicitly and solely for worldly gain is frowned upon, and rape is downright detestable (rape falls under dominion over another and/or biological satisfaction). But I digress. Virginity shouldn’t be sought, but the traits that it is commonly associated with are often valuable, and, I suppose, are why virginity itself is valued.