Mrs. Trick in Tantra Magazine said:
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It's also worth mentioning that men control harder the urination process as they grow older and lose their sexual vigour. Most of them have a prostate problem. Studies have reached the conclusion that men who have an irregular sexual life, with often ejaculation, are most predisposed to prostate diseases, to urinary incontinence and renal infections.
1. First method consists in fragmented urination, which means in very short jets with a few seconds pause in between. The pause has to be long enough so that the urine flow stops completely. Especially at first jets there will be thrills through your body, especially up your spine. They will feel too strong for the weak ones. These thrills are nothing else but a manifestation of the energy transmuted through the firm and strong contractions of the urinary sphincters. Certain texts suggest that this energy (these "thrills") must be visualized and directed up the spine to the zone in the middle of the forehead.
2. Second method, that we will call the short urine retention, is stronger: when you feel the need to urinate you will relax the urinary sphincters and contract them immediately, firmly before the urine to come out of the bladder. It's a method that requires a very good control and it will be practiced only at toilet at first. Exercises are being done usually before urination (that has to be fragmented, of course). Obviously we will approach it gradually, without forcing it.
These two techniques are very efficient and it is better to be used permanently, transforming the common act of urination into a part of our daily training for harmonizing again the sexual energy, to obtain control or to maintain a perfect state of health and [vigor].