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Research Center For Multiple, Sexual Orgasms 
where you can find the ultimate solutions for Tao of Love and Rejuvenation.

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 she experienced vaginal burning sensation after his ejaculation? On the role of prostaglandin E-1 and E-2 in precum, semen and vaginal/cervical secretion during intercourse.
Reader:  10/08/2004>Dr.Lin: I feel great burning sensation when my bf ejaculates in me and the burning sensation would last up to 1 or 2 hours, even cleaning with water won't help. When he use condom, there won't be any burning sensation. What is the problem? is it some kind of infections or his sperm is acidic?
Dr. Lin: 10/08/2004>This problem is associated with vaginal abrasion and a high level of prostaglandin E-2 in semen and in your vaginal tissue..
Vaginal abrasion occurs when your vaginal tissue is under excessive friction for induction of the prostaglandin E-2 synthesis, but produces insufficient prostaglandin E-1 to retaining the tissue integrity and healing the damaged during sex.
A high level of prostaglandin E-2 in semen or precum suppresses the immune in the urethral tract, penis, vagina and cervix, and induces the prostaglandin E-2 synthesis in the labia minors, vaginal orifice, vaginal canal and cervix for the burning sensation.
The vagina and cervix themselves also produce a lot of prostaglandin E-2, as well as prostaglandin E-1. Prostaglandin E-2 is the bad guy, but it helps the cervical office to open for sperms to swim into the uterus for fertilizing the egg; prostaglandin E-1 is the good guy, the healer and housekeeper that improve and retain the integrity and elasticity of the tissue, nerve and blood vessels. Prostaglandin E-2 in the prostate and urethra dilates the ejaculation duct for semen emission, leading to premature ejaculation. Prostaglandin E-1 tightens the male ejaculation duct for lasting longer and, at the same time, induces a hard erection at the same time.
If your vagina/cervix produces too much Prostaglandin E-2, you are likely to get infection or abrasion and also induce his premature ejaculation during intercourse. It also causes penile abrasion too.
If your vagina/cervix produces a lot of Prostaglandin E-1, you should be trouble free and enjoy a powerful clitoral and G-spot erection and nervous sensitivity, and, at the same time, can make his penile erects bigger and last longer when prostaglandin E-1 gets into his urethra from your vagina and cervix.
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