There is no way to know if someone is a virgin. Not every girl bleeds the first time she has sex. There is thin skin covering the vagina entrance called a HYMEN. Girls with a hymen sometimes bleed when they first have sex. Girls with little/no hymen do not bleed the first time. Girls can lose the hymen by climbing trees and riding bikes. Some girls are even born without it. Girls with no hymen are still virgins, as long as they do not have sex. Virginity is nothing to be ashamed of.

Attribution: Straight Talk Foundation