...an early study at Yale demonstrated that infants laugh much more readily when tickled by their mothers than when tickled by a stranger. This kind of laughter isn't just a knee-jerk physiological reaction; it's a message used to regulate social interaction. #RobinHanson

Comments

Popular posts from this blog

By the end of [1950s], the average marriage age of women in America dropped to 20, and was still dropping, into the teens. [14M] girls were engaged by 17. The proportion of women attending college in comparison with men dropped from [47%] in 1920 to [35%] in 1958. #BettyFriedan