ABSTRACT
We have evaluated penile sensory levels in patients with primary premature ejaculation to determine whether there is an etiological basis for this disorder and whether there is a sensory difference among these patients Penile biothesiometry was performed in 78 patients with primary premature ejaculation and in 20 men with normal satisfactory ejaculation as a control group. Both patients and control men selected from the same age group [30-40 years]. Vibratory thresholds were recorded at the glans penis and both lateral aspects of mid penile shaft. Vibratory thresholds of the three location sites [glans penis and right and left mid penile shaft] in the patients group were significantly lower than those in the normal control group, Based on the glanular vibratory threshold, the patients were classified into three subgroups. The average of thresholds of the three location sites was used as an indicator for the penile sensitivity as a whole in each patient and it was termed by us as penile sensitivity index [PSI]. significant differences in PSI were detected between the three subgroups of patients. Patients with primary premature ejaculation have penile hypersensitivity with different grades. This may provide further implications for an organic basis of primary premature ejaculation. Penile sensitivity index [PSI] may provide a quantitative evaluation of premature ejaculation and may aid in the selection of therapy and evaluation of its outcome