人到中年,理应身体强健,婚姻美满。然而,却有相当一部分四五十岁的男人性功能明显减退。主要表现为性反应迟缓、精液量少、性生活后极度疲乏、不应期(即连续两次勃起射精间隔的时间)大为延长等。心有余而力不足的感觉给他们平添了挥之不去的烦恼。性功能与年龄有直接关系。我国 Middle-aged people, should be physically strong, happy marriage. However, quite a few men in their forties and fifties have a marked decline in their sexual functions. Mainly for the slow sexual response, semen less, extremely tired after sex, refractory period (ie, continuous erection of ejaculation interval time) greatly extended. The feeling of lack of effort to add to their lingering troubles. Sexual function and age are directly related. My country