Sexual intercourse is a pleasure in which one must be relaxed in order to better perform and enjoy it. But because sexual dysfunctions occur, couples are no longer able to enjoy it. Scientific investigation has supported the long-held notion that sexual function in men declines with age. A variety of studies indicate that as men reach late middle and old age, the frequency of sexual activity becomes lower, libido is diminished, and an overall decline occurs in such parameters as sexual thoughts, sexual enjoyment, and erectile and orgasmic function.

Many factors apparently contribute to this decline, including such nonspecific agents as decreased health and mobility, increased incidence of disease, partner considerations, and increasing neurologic dysfunction. These male dysfunctions can have different effects on their partner's sexual interaction. Females may become sexually cold towards their male partners for they are dissatisfied of their sexual performance. There could be less communication between couples because either of the two is hesitant to talk about the situation. Worst case would be that these dysfunctions may lead to the couple's separation.

Sigmund Freud, the father of psychoanalysis, conceived libido as the sexual impulse or sexual need of a person. It is the sexual appetite determined jointly by arousability and motivation to engage in consummatory actions. Libido has been attributed to sexual engagements and from dream content, diaries, sexual excitability and sexual desire.

The frequent causes of sexual dysfunction and loss of libido are anxiety, depression and anger. Men are anxious when they are not able to fully arouse a female partner during sexual intercourse. Any anxiety may block sexual performance. Depression is one of the important causes of impotence. Severe depression is not only a mood characterized by sadness, hopelessness and poor self-esteem. There are also the so-called physiological signs of sleep disturbance and loss of appetite. A depressed male may appear impotent and may further add to his feelings of incompetence and deepen depression. Thus, an impotent male may become depressed because of his poor sexual performance or vice versa. Anger may be another causal emotion in sexual dysfunction. It may stem from marital problems, infidelity or domination by the wife, and needs not being met.

Depression, anxiety and anger are also evident on males having a small penis size. Acquiring a larger penis size increases a man's self-confidence and sexual function. It increases the pleasure of sexual sensation during intercourse. Men can focus on the feelings of being sexually aroused if they are not insecure with their penis size.

Psychological, as well as physical well-being, contributes importantly to the maintenance of sexual activity. Aside from that, positive attitudes towards sexuality influence a man's ability to perform well during sexual intercourse. His larger penis size, stable sexual function and fair amount of libido are really beneficial to his female partner. They can excite a female's sexual desire and arousal, thus promoting a healthy sexual life.