Massaging the perineum during sex, sex play, or while masturbating can give your orgasm that extra oomph by indirectly stimulating your prostate. G-Spot heaven is when she straddles him, facing away. This way, his penis is angled to stimulate her G-Spot and she can gently massage his perineum at the same time. Just be sure to communicate with your partner, indicating what feels good and what is too much. If your partner is a woman, she may not know all of this intuitively, so a little guiding instruction can lead you both to uncovering the hidden pleasures of the human body.
Some men can reach orgasm through prostate prodding alone.
Another way to access the prostate is through the anus. The prostate can be found 1 or 2 inches within the anus, towards the penis. You can experiment alone at first, using one hand to stimulate the prostate and the other to stroke your penis. If it is a pleasurable experience, it may be fun to bring this sort of G-Spot play into your partner's bed. You can ask your partner to tickle your g-spot for you.