这篇科普很好，看来干什么都得讲科学
	文章来源: wangshifu 于 2010-04-07 12:33:35

See, the problem is that God gives men a brain and a penis, and only enough blood to run one at a time. —Robin Williams 不知道茶部长对上面这句有什么意见 http://www.foxnews.com/story/0,2933,590426,00.html