This impotence is more obvious, because, even though it exist libido, the lack of erection (anerectia) makes impossible accomplishing the sexual act (impotentia errectionis). The anerectia can be total (when the morning one misses as well), elective, intentional or of abandonment (abandoning the erection after intromission or meanwhile, before ejaculation and orgasm). 
According to the degree of the disorders, it exists the anerectia and the semierection (the incomplete erection). For the doctor, it is difficult though to establish exactly the degree of this semi-erection, which can only be an impression of the patient. It also must be specified that the anerectia refers to the lack of erection at normal coitus. It is possible to exist anerectia, but for the subject to have erection during masturbation, during sleep, in his dream or in the morning when waking up.
The absence or the diminution of the erection can also be relative, in report with the lack of some normal erectile reflexes and especially psycho-sensorial, having as starting point the partner. The causes of the erection disorders will be discussed with the occasion of the ethio-pathogenic classification of the sexual impotence.
The sexual impotence through the impossibility of intromission
This impotence is due to an abandonment of the erection before or during the intromission, through psychic inhibitory factors or because of some obstacles created by anatomical-pathological modifications of the feminine genital organs.
The sexual impotence through ejaculation disorders
The permanent absence (total anaejaculation) or the intermittent lack of ejaculation, the lack of ejaculation only with a certain partner (elective anaejaculation) are accompanied almost as a rule that anaerection; rarely the anaejaculation manifest isolated. Frequent enough though, the patients accuse other two ejaculation disorders: the precociousness (two minutes before starting the copulation), sometimes “ante-portas” and tardiness (thirty minutes after copulation).
It is not easy to label an ejaculation as being precocious. According to Bergler, the ejaculation is normal after two-ten minutes from intromission, meaning after sixty-one hundred copulatory moves. In the lack of these parameters, we cannot base only on the impression of the patient or the partner. It must also be taken into account the fact that at some individuals exist faster ejaculations, which belong with their sexual biotype, therefore within normal.