If you have never ejaculated through any form of stimulation (such as wet dreams, masturbation, or intercourse), see a urologist to determine if the problem has a physical cause.
If you are able to ejaculate in a reasonable period of time by some form of stimulation, see a therapist who specializes in ejaculation problems. Sex therapy usually includes both partners. The therapist will usually teach you about the sexual response, and how to communicate and guide your partner to provide the right stimulation.
Therapy often involves a series of "homework" assignments. In the privacy of your home, you and your partner engage in sexual activities that reduce performance pressure and focus on pleasure.
Typically, you will not have sexual intercourse for a certain period of time, while you gradually learn to enjoy ejaculation through other types of stimulation.
In cases where there is a problem with the relationship or a lack of sexual desire, you may need therapy to improve your relationship and emotional intimacy.
Sometimes hypnosis may be a helpful addition to therapy, especially if one partner is not willing to participate in therapy. Trying to self-treat this problem is often not successful.
If a medication is believed to be the cause of the problem, discuss other medication options with your health care provider. Never stop taking any medicine without first talking to your health care provider.