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Case Title:  Why his erection goes limp when he is ready to penetrate, but not in hand jobs or masturbation? no good for sexual orgasm.
Reader: 3/26/2003>
Hi, I have a question I hope you could answer. For some reason, a lot of the time when I am intimate with my girlfriend and we get serious and start taking our clothes off, I lose my erection. I have no problem maintaining an erection when masterbating, but for some reason, when I'm with a girl and we get serious (start taking clothes off), I lose my interest or something happens and I can't maintain my erection. Is this because it's not receiving enough stimulation or because I need to have erotic thoughts or what?!? I have no idea why that happens but believe me it's the most annoying thing in the world.

Dr. Lin: 03/26/2003>

We call this problem the Sympathetic Nervous Flight - "Erectiion Withdrawal."
If you contiinue to have sex, your brain's autonomic nervous control will ignite the Sympathetic Nervous Fight - "Premature Ejaculation" if your prostate still produces semen for ejaculation. That is, you also face the preamture ejaculation problem if you can still penetrate her vagina.
The problem is: the brain's acetylcholine/parasympathetic nervous function fails to continuously charge the nervous bioelectric potential of the S2-S4 parasympathetic nerves in the support of your penile erection due to your sexual exhaustion. Thus, without the bio-electrical recharging system to support your sexual function, your barin switches the autonomic nervous function from the parasympathetic mode to sympathetic mode for the "Fight or Flight" execution.
This means: you are in an importent or semi-impotent state as stated in this link -
You have to rely on a heavy stimulation of your urethral nerves and/or a heavy PC muscle contraction (exercises) in supporting your erection during your masturbation.  Once the stimulation of your urethral nerves is stopped, your penis goes limp immediately.  Stimulation of your urethral nerves and/or the PC muscle contraction (exercises) also trigger a flooding of precum from your bulbourethral glands; when the precum will further stimulate your urethral and prostate nerves, you will ejaculate very quickly (immediately).  This is why weak erection causes premature ejaculation. Your Over-masturbation during or prior to your puberty has started to tax your sexual function, and of course you have to pay the toll. There is no free lunch in the bedroom.

How to prevent the penis from going limp during lovemaking for better sexual orgasm; why his penis goes limp in his performing turn.
==> http://www.actionlove.com/cases/case10370.htm 
Why his erection goes limp in penetration sex, but not in oral sex, hand jobs or masturbation? no good for sexual orgasm.
==> http://www.actionlove.com/cases/case10331.htm 
Why his erection goes limp during sexual encounter for sexual orgasm
==> http://www.actionlove.com/cases/case10037.htm 
Why his erection goes limp in the middle of intercourse for no sexual orgasm? Solution!
==> http://www.actionlove.com/cases/case9081.htm 

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