女性为什么会有处女膜？

《物种起源》最后一段还是值得玩味的：“There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one;and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been,and are being,evolved.”商务印书馆版的翻译：“认为生命及其若干能力原来是由造物主注入到少数类型或一个类型中去的，而且认为在这个行星按照引力的既定法则继续运行的时候，最美丽的和最奇异的类型从如此简单的始端，过去，曾经而且现今还在进化着；这种观点是极其壮丽的。”