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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:  The cervical prostaglandin E-1 can erect the penis bigger and last longer; why the male PC exercises during sex and the dry vagina causes male premature ejaculation for no sexual orgasm
Reader:  9/29/2004>
Hey Doc,

When my girl is on top of me and she's stroking me pretty fast, my erections seems to fail after about 30 stokes or so then in desperation I flex my penis muscle to try to save my erection thus bringing me to an orgasm.

Now when she's pretty wet I can sustain an erection longer, but when she's not as wet I think it causes to much friction on my penis thus causing me to lose my erection or my penis to soften. Any tips Doc.
Dr. Lin: 9/29/2004>If her cervix releases a lot of prostaglandin E-1 seeping into your urethra, your penis will erect harder and last longer.
On the other hand, if her cervix produces a lot of prostaglandin E-2, you will come extremely quickly upon penetration.
If her vagina is very dry, friction and abrasion will induce your penile tissue and urethra to synthesize prostaglandin E-2 for premature ejaculation.
If you have to flex your PC/Prostate muscles in assisting your erection, your PC/prostate muscles will convert testosterone into DHT and also boost both prostaglandin E-1 and E-2 synthesis in the prostate tissuse. Both DHT and prostaglandin E-2 in the prostate/PC muscles will inflame your prostate with sympathetic nervous panic and tension, induces precum release from the bulbourethral glans, and trigger your urethra and prostate for premature ejaculation. That is why I discourage our readers to contract the PC/prostate muscles during sex.
Both DHT and prostaglandin E-1 in the penile tissue will increase your penile size and let you last longer, but DHT and prostaglandin E-2 in the prostate and bulbourethral glands will give you a lot of problems during sex.
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