It's a similar question to one we've just answered. Orgasm, ejaculation and erection are real separate sexual functions in men. Of course, another sexual function is drive, what we call libido. There are several reasons for men to have delayed orgasm, or diminished orgasm. And the most common, I would think, is just simply aging, changes in sensation. Since orgasm ultimately is a sensory event, sensation must reach a certain part of the brain in sufficient quantity as to then release what we call a propagating wave, which spreads in a portion of the brain resulting in the pleasure of orgasm. If you don't reach this ultimate sensation event in the brain, orgasm won't happen. Also medications prevent orgasm. Medications for example, such as things like Prozac, drugs that are for depression, we actually use for men who have premature ejaculation to slow down their orgasm ejaculation reflex. I would strongly encourage you to see a doctor. One of the best therapies we now have is vibration therapy, to enhance the amount of stimulation to the important part of the brain that orgasm is happening.