This is because women have difficulty advocating for themselves and their children.

VOA: standard.2009.09.20

Other cultures are more picky and they don't talk to their children until their children themselves are talking.

其他文化则更加挑剔,直到孩子自己能够开口说话,他们才会和孩子讲话

耶鲁公开课 - 心理学导论课程节选

Our genes have wired us up our brains up to love our children and love our kin because, in this way, our genes manage to replicate themselves.

基因把我们联系在一起,让我们去爱孩子，爱亲人，因为，这种方式，基因可以复制。

耶鲁公开课 - 心理学导论课程节选