The genital of either sex can be used to represent genitality of the opposite sex. Either organ can be used unconsciously in either sexual function. One patient, a male exhibitionist, wished to be a woman yet still have a penis; this he achieved by conceiving of his penis as a vagina, its urethral opening serving as the recipient of other objects. A woman dreamed that the mucosa of her vagina was blown out and emerged like a penis. Symbols such as the nose, a shoe, an auto, or a hat can represent either the phallus or the vagina, depending upon whether they are viewed as convex or concave, as projecting or containing. By such distortions of reality, a woman with masculine urges can deny castration, or a man with strong female identification can express his bisexual impulses without risk of castration.