for me yes, we should keep our self virgin. this is becoz oneday when we get married the virginity is the only present that we can give to our couple that can't find anywhere except from yr self.and that is something suprises.actually sex is somethings interesting if we use it the right way. becoz GOD also see that sex is good that why the things is created(for marriage sex only).But GOD really hate adultery and the punishment for that is is only DEAD.so think about it. God Bless U.