Erections occur when sexual excitement sends signals from the brain through the nerves to the male genitalia. The male genitalia contains a tissue called the corpora cavernosa, a bundle of countless blood vessels.  When these vessels expand, a large amount of blood flows in. The corpora cavernosa, like a sponge, absorbs the blood and expands, becoming hard. This is the mechanism of an erection. ED occurs when a disruption happens at some point in this process due to various causes. “There are three types of ED: ‘organic ED,’ caused by vascular problems due to aging or illness; ‘psychogenic ED,’ caused by mental stress; and ‘drug-induced ED,’ caused by medication side effects. Among these, wife-only ED falls under ‘psychogenic ED.’ When a person feels nervous or stressed, the transmission of signals from the brain becomes impaired, leading to insufficient erections even when attempting to have sex.” The common denominator is a serious and gentle personality. A common cause of wife-only ED is the pressure associated with trying to conceive. Although the man may want a child, the tension of needing to have sex at the right time to increase the chances of pregnancy can cause things to not go as usual. Many men visit the clinic with the troubling feeling of wanting to cooperate with the fertility efforts, but finding it difficult to perform as expected.