一只蝎子要过河,青蛙看见了,主动托蝎子过河。一到对岸,蝎子就忍不住蜇了青蛙一下,青蛙临死前说:“我好心托你过河,你为什么还要蜇我?”蝎子答到:“Sorry, I didn't mean that, but it's my nature.”