No erection under any circumstances; spontaneous erection during non-sexual behavior, such as erection at first awakening from sleep, sexual dreams (sexual dreams are also a form of sexual arousal), or when the bladder is highly charged, but in preparation for sexual intercourse, it is not possible to get an erection; erection is possible at the initial stage of sexual arousal but disappears when attempting to penetrate the vagina; in the past, there had been a satisfactory erection and vaginal penetration, and the ability to complete the process of sexual intercourse without difficulty. Erectile dysfunction developed only later.