"A hymen is a membrane that, when broken, is used to indicate that a woman is no longer a virgin. Each player of a female character may, at their option, determine the Hymen Resistance of the character by rolling 5d20. A 100 means she was born without a hymen. Every time a male inserts his Manhood into a female with an intact hymen, he must roll 1d100 to see if it breaks, and it may only break once. He must divide Manhood Circumference by Vaginal Circumference Potential and multiply the quotient by 100. Apply this modifier to the roll. If the result exceeds her Hymen Resistance, then it was broken. If it breaks, then blood seeps from her vagina. Common folk consider an unbroken hymen indicative of virginity, though she may either have a high Hymen Resistance or never have accommodated sufficient Manhood."