popular science? These three expressions correspond to the "three non-apes" in Japan: don't look, don't listen and don't tell. One explanation is that it originated from Confucius' famous saying: "Don't say anything if you are indecent, don't listen if you are indecent, and don't look at it unless you listen."
I hope the answer will help you. A big wave of emoji expressions is waiting for you to study, and the surprise will be known after the inquiry.