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On the other hand, if a man applies the internal pressure on the empty bladder by expanding his lower abdomen he should be able to fool the sexual sensing system around his penis. When I practice the internal pressure myself, I feel my prostate gland and anus are expanding (instead of Contracting) against the bladder too, and thus reduce the sensitivity of my sexual nerve. If a woman can contract her vagina/anus area with a full bladder, she should be able to make the wall between the vagina and urethra/bladder becomes extremely sensitive to the external stimulation.

The following graph show the external hot spot and trigger zone for men and women. The location of the trigger zones are about 1-3 inches long, starting from the opening of the urethra. Practically, during the love coupling (intercourse), the male should avoid stimulating his trigger zone when his penis is hard enough, pointing to 12 - 2 o'clock positions, and must apply a lot of pressure on her trigger zone by his finger plier or hard penis.

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