The unibrow. Frida Kahlo made it a statement of confidence and power. Synophrys has been a desirable feature in several cultures. The Arabian culture associates the fusion of eyebrows as a sign of beauty. It is uniquely mesmerizing because according to one report, only 12% of study subjects in Oman have this facial feature.
The eyebrows, of course, are not just a beauty fixation. They are functional. Imagine the cascade of forehead sweat upon an eyebrow-less face. Alternatively, try to show anger or surprise without eyebrows. Eyebrows help us communicate. In one study, participants were able to identify personalities with eyebrows alone and eyes digitally edited out 60% of the time. For Frida Kahlo, her unibrow was an expression of strength.