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Sexual impotence resulting from prolonged alcohol abuse may persist even after years of sobriety. The authors believe this problem is neither a psychological nor a hormonal defect but is due to the destructive effect of alcohol on the neurogenic reflex arc that serves the process of erection. The damage may be irreversible, accounting for the inability of some men to reattain potency.
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Lemere et al. (1973) studied this question.
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