The book is Kama-Tantra, Prem-Tantra Dr. R. S. Sathe http://sexualhealth.com/experts/viewexpert.cfm?ID=87

BElow is an answer to someone else referencing Raje's suggestion. The question asked was " Masturbating too much?"

The answer: " Masturbation is not harmful physically (unless you are too rough on yourself) and is a perfectly healthy behavior but with some caveats. Frequent masturbation may contribute to either rapid or premature ejaculation when with a partner or conversely, the inability to ejaculate during intercourse. Many men masturbate quickly, standing up and using one hand and condition themselves to this response. This works fine for immediate release of sexual tension or even stress or difficulty falling asleep. However, over the long-term, it may create complications. Also, it is my humble opinion, and you can find many sexuality professionals who may disagree, there is such thing as too much masturbation. In my book, if you're masturbating four times a day, you may be ejaculating four times a day and benefiting from the immediate effect it has in your body but not taking the time to let the sexual energy build that results in a more satisfying and satiating orgasm with your ejaculation. One of our experts recommends a technique for masturbating to avoid potential future problems. Instead of just using your hand, lay face down on your bed and use a slow rhythmattic thrust from your hips as you would with sexual intercourse. Satiny sheets help! Take your time, let your energy build, incorporate fantasy if he'd like, slow down before you get too excited and start again when you think you have things under control. Also if stress is an issue in your life, you may benefit from learning other ways to manage it like exercise or meditation."

HOpe this helps.

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