Combination of sexual dysfunctions
It is not uncommon for a person to suffer from simultaneous sexual dysfunctions and there is a clear connection between them.
For example, studies have proved that 36% of men who have problems with erection also have problems with premature ejaculation (Grenier and Byers). Erectile dysfunction is thus listed as the single most important cause of premature ejaculation. The psychological explanation is that the worry of not being able to maintain the erection leads to an extorted unwanted premature ejaculation.
The reverse situation is also common. If there is a risk of premature ejaculation, it is common for the man to try to handle the situation by thinking of something non-sexual, which instead may aggravate the problem and lead to erectile dysfunction.