Long, thick, full eyelashes are so universally understood as being a feminine feature. When animators want to differentiate two otherwise identical cartoon characters, they add lashes to the female. If you see two identical characters, one with long lashes, and one without, there's no question which one is female. But why? Men don't have eyelashes now? In point of fact, many men have long, thick, full eyelashes. Me, for example. My hairdresser, who is female, is envious of my lashes and often comments on them, saying things like, "guys always get the good ones." The brother of a good friend of mine has lashes so long that his family teases him about them. I do not believe that lash length/density has any correlation whatsoever with sex. So why is it so universally thought to be feminine?