Direct physical damage to the male reproductive tract can result in impotence. In most cases, however, there is no obvious reason for this condition.
The main problem of secondary impotence is the apprehension created by failure which generates a good deal of anxiety for the next time round regarding the likelihood of failure. If, in fact, intercourse is attempted again and the same failure results, then a vicious circle is established. Anxiety of failure is established as an anticipatory reflex which in turn impairs the capacity of the penis.