Signs - signifiers and signifieds - in a person's nonverbal behavior

How can you see signs - signifiers and signifieds - in a person's nonverbal behavior? How about your own use of nonverbal signs (clothing; hair style; scents; hair care on head and elsewhere; body manipulation such as piercing, dieting, weightlifting, tattoos)? Do they illustrate particular identities? In what ways do you either pass on or challenge prevailing "ideologies" through your own use of nonverbal signs?