Something that Robert Provine has pointed out, as you can see here, and the reason why we were laughing when we heard those funny laughs at the start, and why I was laughing when I found my parents laughing, is that it's an enormously behaviorally contagious effect.
Asta a arătat Robert Provine şi motivul pentru care râdem, cum ați văzut la început, şi ca atunci când mi-am găsit părinţii râzând, e că râsul are un efect contagios.