As the erection proceeds, the physical sensations become increasingly more and more exciting, and the psychological pressure to ejaculate becomes more and more intense. The ideal is to keep the stimulation just below the level required to ejaculate while learning to deal with the increasing psychological pressure to ejaculate. Like driving a racing car closer and closer to the wall at ever higher speeds, the psychological pleasure becomes more and more intense, the longer the arousal can be maintained without ejaculation, but the greater the enjoyment for the man. Furthermore, the longer ejaculation can be delayed, the more pleasure can be shared with the woman, who usually requires a much longer period to become fully aroused. A woman can also remain sexually stimulated and enjoy sexual pleasure far longer than the man and often can have multiple orgasms without the refractory period that most men require after ejaculation.
Frequent ejaculation is needed for healthy sexual function.
In young men ejaculation typically occurs at least once a day either by having sex or masturbation. As we age, frequency becomes less but varies greatly. If you are not properly using your sexual organs nature provides a last resort - wet dreams. This is the body's natural way of keeping healthy if you don't exercise your sex organs as nature intended. Lack of frequent ejaculation can lead to prostate blockage and other problems.