Darwin claims that bread gave men who wanted to conquer the females an evolutionary advantage. Our predecessors did not allow their facial hair just to grow, as a cheap, disposable razor could not be found in Wal-Mart. Instead, our male ancestors grew beards due to women's selection. As women seem to have favored bearded men over clean faces since the Stone Age, we guys have slowly discovered that the beard is a developmental advantage. Although Darwin considered that beards had initially developed because they were an appealing factor in the male face that women desired, other explanations for beard survival can also occur. One study indicates that women may be drawn to bearded and mustached men as they signify higher resilience and immune systems. This hypothesis indicates that beards were always the focal points of infection and potential places for raising parasites. If he could survive the attacks of parasites, he could perhaps withstand the rest of the million other creatures that a prehistoric man could kill. Another less hideous theory of evolution suggests men with mustaches have superior genetic fitness. Mustached men are more muscular, sturdy, and sportive – qualities highly desired in a world where your food has to be hunted or harvested by hand.