Brainmites are extremely fragile beings. Little more than a central nervous system with a rudimentary muscular and skeleton, they have little in the way of natural defenses. Brainmite culture has thus evolved along neurotic, paranoid lines. The creatures have an inherent distrust of anything larger or stronger than they are. Brainmites are extremely xenophobic. Outsiders are deliberately segregated. Contact with others is seen as a "corrupting" influence for Brainmite youth.