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Based upon "Resonant Excitation Of Sexual Orgasms - Tao Of Love Coupling"
by Newman K. Lin, Ph.D., PE, a bridge between the Eastern Taoism Sexuality and the Western Engineering Science.==> [ORDERING THE BOOK]< =>[Why?]
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Warning: This is NOT an XXX Website, But we deal with Multiple, Sexual Orgasms and Impotence!
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Case Title:  Why this 20-year old man experiences orgasmic dysfunction and  withdrawal  for no sexual orgasm. On the role of prolactin and oxytocin in the sexual and orgasmic functions and in the switching of sympathetic nervous beta and alpha receptors for orgasmic contraction for men and women.
Reader : 7/31/2004>
My problem is that I've never had an orgasm from sex or from oral sex. I can achieve orgasm manually and do so about every other day. Whenever I think I will achieve orgasm during sex the feeling always recedes. What could I do to be able to have an orgasm during sex, because being in the act for an hour doesn't seem to work.
Dr. Lin: 8/01/2004>This problem is due to an excessive sex-stress induced prolactin released from your pituitary gland. Excessive Prolactin release (suppressing the effect of oxytocin) is responsible for shutting the sexual/orgasmic function and seminal production down.
Sexual arousal or thought (induced sexual fantasy, kissing, body touching, visual or auditory stimulation) or the direct or indirect stimulation on the itchy or sensitive spots of the erectile/swelling sex organs (glans neck, urethral nerve, prostate, clitoris, G-spot, urethral/vaginal spongy tissue, Epicenter/cervix) via the sympathetic/sensory L1/L2 nervous (orgasmic/ejaculation) circuits to the hypothalamus/pituitary gland triggers the dopamine-norepinephrine-epinephrine conversion in the hypothalamus and pituitary gland.
Norepinephrine triggers prolactin and oxytocin release from the pituitary gland. Prolactin forces norepinephrine and epinephrine to bind into the sympathetic nervous alpha receptors for constriction or contraction while oxytocin wants norepinephrine and epinephrine to bind into the sympathetic nervous beta receptors for dilation. The alternative effect of prolactin and oxytocin on the binding of norepinephrine and epinephrine into the sympathetic nervous alpha and beta receptors in the sex organs generates periodic sexual orgasmic contraction.
Orgasmic contraction of the autorhythmic and contractile fibers in the prostate (or Epicenter/cervix/uterus for women) is initiated by a high level of oxytocin and driven by the sympathetic nervous acting potential (voltage) when the dominant binding of norepinephrine and epinephrine is switched back and forth between the beta and alpha receptors, where the nervous-receptor switching is produced by the alternative effect of prolactin and oxytocin on the nervous receptors, directly associated with the alternatively oscillatory prolactin and oxytocin release in the feedback response of the hypothalamus/pituitary glands to the natural/resonant prostate (Epicenter/cervix/uterine) contraction at a rate of 0.8 seconds via the L1/L2 sympathetic nervous circuits. The heart and lungs also have a lot of contractile fibers to respond to the alternative switching of the sympathetic nervous alpha-beta binding during orgasm (please also read 
 http://www.actionlove.com/cases/case12488.htm, http://www.actionlove.com/cases/case10296.htm , http://www.actionlove.com/cases/case8990.htm)
An abrupt over-shooting of norepinephrine, oxytocin and polactin upon orgasm will causes orgasmic seizure, blackout or headaches ( http://www.actionlove.com/extra/headache.htm ) if there is insufficient serotonin/GABA nervous modulation on the dopamine-norepinephrine-epinephrine conversion or/and if there is an insufficient acetylcholine/parasympathetic nervous action on the prostaglandin E-1 production. Orgasm is the most stressful sympathetic nervous Fight action on the brain, heart and lungs. If your body can not take it,  your brain should turn this sympathetic nervous action to Flight. If not, you will be in a deep trouble.
After orgasm or ejaculation,  prolactin produces more effects on the sympathetic nervous alpha receptors than oxytocin on the sympathetic nervous beta receptors, and then, your sympathetic nervous function may naturally trigger a Flight action withdraw your erection or desire. It is normal to have non-premature ejaculation with orgasm and then lose your desire and erection. But, it is "abnormal" to have premature ejaculation even with orgasm within 3-5 minutes, or to go limp (naturally, no orgasm) during sex, or encounter orgasmic or ejaculation difficulty (the sympathetic nervous L1/L2 functional/contraction disorder due to insufficient nervous voltage, or/and the parasympathetic nervous seminal production disorder in the seminal vesicle or prostate ) after 1-2 hours hard erection with penile stimulation.
The first 2 conditions usually happen when your acetylcholine and serotonin nervous functions are too weak to modulate the dopamine-norepinephrine-epinephrine conversion in the hypothalamus, leading to a deficiency of dopamine and an over-production of norepinephrine and epinephrine in the hypothalamus and pituitary glands, or when your androgen hormones (DHEA, androstendione, testosterone and DHT) levels in the brain and cerebrospinal fluids are too low to support seminal production.  Under these conditions, your pituitary gland produces an excessive prolactin to withdraw your sexual or/and orgasmic function, and your hypothalamus executes a sympathetic nervous Flight action before a sympathetic nervous Fight action.  The brain's dopamine and DHEA/androstenedion/testosterone levels plays the key roles in the sexual and orgasmic functions.  Dopamine is the orgasm fire and testosterone is the orgasm fuel.
Over-masturbation/over-ejaculation or excessive orgasm generally alternates the gene and enzyme expression and thus results in a chronic elevation of prolactin, norepinephrine and epinephrine for sympathetic nervous fires, erectile/orgasmic dysfunction, and seminal production disorder, as parts of sexual exhaustion symptoms listed in http://www.actionlove.com/cases/case9848.htm .
Please also read read -
http://www.actionlove.com/extra/semendry.htm 
http://www.actionlove.com/extra/impotent.htm 
http://www.actionlove.com/extra/over.htm  
http://www.actionlove.com/extra/over2.htm 
http://actionlove.com/extra/girloversex.htm 
http://www.actionlove.com/extra/penilepain.htm  
http://www.actionlove.com/extra/testicularpain.htm  
http://www.actionlove.com/extra/backpain.htm  
http://www.actionlove.com/extra/headache.htm  
http://www.actionlove.com/extra/prostat.htm  
http://www.actionlove.com/extra/eyefloater.htm  
http://www.actionlove.com/extra/earbuzzing.htm  
http://www.actionlove.com/extra/pe.htm 
http://www.actionlove.com/extra/uti.htm  
http://www.actionlove.com/extra/hailoss.htm 
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