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Symbiosis anxiety is the fear one may not escape from the primitive urge to merge again with mother. If, as is suggested, there is a stage at the beginning of life in both males and females when one feels as if a part of mother, this will establish a feminine quality in one's identity. While helpful for the girl who is to become feminine, it can threaten the boy's capacity for masculinity. Much of what a society calls masculinity may be, then, an attempt to keep separate from mother's attraction.
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Robert J. Stoller (1974) studied this question.
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