回复：现在真是谈色色变，大家都打住吧，你儿子的大牙掉了还笑得

sorry, typo arguing, not agreeing.remind me that
both of my sons complained Chinese coaches have no sense of humor,one is from drive school for teenage, another from swim school. I explain to them there is no funny business between teacher and students in Chinese culture, only serious learning matter. I just want to put water in fire, because i guess some Chinese are too serious and easily turn around a steep corner.