Not only the type but the amount of stimulation may have to change as well. Some men will require almost constant stimulation of the penis to achieve an erection. Avoid pulling too aggressively on the penis, as this tends to encourage blood flow toward the body. Squeezing the tip or shaft of the penis too tightly may also reduce turgidity. While oral and manual stimulation are an effective means of attaining erection for most men, it does not work for everyone.
Vaginal intercourse is the preferred method of many men.
Often what works best for some couples is that the man places his flaccid penis in the woman's vagina. Then she begins to flex the vaginal muscles near the opening which can assist erection. The most important aspect in combating impotence is to ensure that the man is comfortable. The pressure to perform can be the cause of impotence. If the man feels that he is under a lot of stress, he may have difficulty achieving erection.