[Studies on sexual activity in Japanese males based on inquiry about sexual behavior: especially in association with...

To study the changes in sexual function, especially potency in males with age, 3,389 married male patients who visited the urological department were inquired about their sexual behavior, and the following results were obtained. Sexual intercourse was performed once a week or more in 95.2% of those aged under 30 years, 84.2% of those aged between 30-39 years, 55.2% of those aged between 40-49 years, 26.3% of those aged between 50-59 years, and 10% or less of those aged 60 years or more. Conversely, the percentage of those reporting no sexual intercourse increased with age, especially markedly after 50 years of age: 10% or less in those under 50 years, 21.1% in the 6th decade, 44.8% in the 7th decade, and 69.5% in the 8th decade. The awareness of morning erection decreased gradually with age. In those 60 years or older, the percentage of those without morning erection was higher than those with morning erection. The association between the testicular volume and potency was unclear in those under 50 years of age. However, in those between 50-69 years, potency tended to be reduced with the decrease in the testicular volume. The frequency of sexual intercourse in infertile patients with testicular dysfunction was nearly equal to that in those with normal testicular function. The decrease in sexual activity with age appears to be complicated associated with sociological and psychological factors in addition to aging. In a society where the proportion of the aged is increasing, evaluation from various aspects is needed.