It has nothing to do with the physical o symbol of the sign. Air, water, fire, and earth are más so about the way people think and carry themselves, like water signs are más emotional people. They feel things strongly. earth signs deal with logic and analyzing things, and they aren't really emotional. fuego deals with spontaneous behavior, like mostrando out and being in your face. Air signs deal with thinking outside the box and having unconventional o "weird" thoughts and doings, etc.
