By at least 1989, duck face was used by scientists studying chimpanzees to describe the expression they make doing certain kinds of behavior like grooming. To be fair, actresses like Marilyn Monroe had been making this face for decades to make their lips look bigger—although it was more likely to be described as a “kissy face” pre-1989.
While you could argue that the dawn of Myspace profile pictures and digital cameras in the first half of the 2000s spawned the pose, it really picked up around 2012 just as Instagram started getting popular. Despite being the butt of many jokes, it still hasn’t disappeared.
For women, they found, the best option was that flirty, pursed-lips expression commonly known as the “duck face.” As long as women were looking directly at the camera, a flirty duck face was even more enticing than a smile.
Even men who made a duck face while looking at the camera did about as well as men who simply smiled.
Then, in 2015, a group of scientists waded into the duck-face discussion. Researchers analyzed 123 selfies taken from Sina Weibo, a Chinese microblogging site similar to Twitter, and had each person whose picture was analyzed complete a personality questionnaire.
This is a face used in many teenage facebook pictures. They stick their lips out in a fashion that resembles a duck’s beak. It is meant to be seductive, although why anyone would think ducks are sexy, I don’t know. Stay away from these girls, prolonged exposure to them may cause brain cell damage. This is not to be confused with a kissy face, which is a girl making a face as if she were about to kiss someone. This is an okay face under the circumstances that she is in a relationship and sending it to her boyfriend because she’s traveling far away or blowing kisses to her mom or dad through skype. It’s Valentines day. If it is not under these circumstances, then it’s just as bad as duck lips. Results showed that those who made a duck face were more likely to be neurotic, which means they tend to be anxious and moody.