The science of innocence is complex and technical—I shall not worry your little ears with such talk. Suffice it to say the hymen is irrelevant, as irrelevant to us as trousers. The word innocent means without harm—did you know? Your mother ought to have taught you what a dictionary was. There is some debate, when unicorns gather, as to what, exactly, the definition ought to be: one who has not been harmed, or one who has done no harm.
