Confucius said: "To complete a job correctly, you must have a polished tool."  The penis/clitoris/G-spot must be hard and hot; the vagina must be hot (and tight) and naturally lubricating.  This link tells you that all you need is a hard erecting, 6-inch (15-cm) penis which can last for 20-30 minutes without ejaculating since the vaginal length is about 6.5 cm - 12.5 cm (2.58 inches - 4.96 inches)  with an averaged length of 9.6 cm (3.81 inches) and a standard deviation of 1.5 cm (0.6 inches), based upon 50 female genital structures of  the age from 18 to 50, with a mean age of 35.6  around 2004-2005 in the Department of Gynaeology, Elizabeth Garret Anderson Hospital in London, UK..
http://www.newviewcampaign.org/userfiles/file/BJOG%2005-normal-genitalia.pdf
The sexually-arousal vagina can expand to  15 cm (6 inches) or so.
This study confirms Dr. Lin's Finger Pliers Method can stimulate the Epicenter near the front ending of vagina, around the cervix, as described in http://www.actionlove.com/love/g-spot.htmhttp://www.actionlove.com/love/fgplier.htm and http://www.actionlove.com/love/resonant.htm . Based up the Finger Pliers method, it is recommended the penis should erect to an 1-2 o'clock position, so that it can exert a rhythmic stimulation pressure (3-6 PSI) on the G-spot and Epicenter - http://www.actionlove.com/love/clock.htm
The vagina can be mechanically dilated and stretched according to http://humrep.oxfordjournals.org/content/22/7/2020.full.pdf+html . Frequent vaginal dilation and stretching may help sexual responses and satisfaction via the vagal nervous stimulation in the vagina, cervix and uterus. It may also improve uterine prolapse symptoms. Therefore, practicing Dr. Lin's screw method ( http://www.actionlove.com/love/screw.htm  ) with a deep penetration to push the cervix and uterus inward and to stretch the vagina may also improve uterine prolapse symptoms.
We also find  the labia minor length is about the maximum penile diameter that a vagina can take without over-expanding (tearing) pain. According to that reprot, the averaged labia minor length is 6.02 cm (2.39 inches) with a standard deviation of 0.94 cm (0.37 inches).

To enjoy sex, you have to keep your body healthy, so that you can maintain a powerful brain/nervous function and erectile sex tools.
Good-old-days bad habits - marijuana smoking, cigarette smoking, alcohol abuse and over-masturbation accelerate sexual ageing for  erectile dysfunction and penile shrinkage from 8 inches to 7 inches. Ok, tune up your sexual engine,  overhaul your transmission and paint your wagon for your new attractive 26-year old girlfriend.
==> http://www.actionlove.com/cases/case16088.htm
She said ' I ordered some products from you for Vaginal improvement it DEFINATELY WORKS. My vagina is very sensitive and there are ridges in it and it is very gummy.' for  more sexual orgasm.
==> http://www.actionlove.com/cases/case13475.htm
She obsessively enjoys her husband's high school classmate 10-inches huge penis with Dr. Lin's 3-point excitation method for hyper oxytocin and prostaglandin E2 release. Oxytocin and prostaglandin E2 for hyper sex drive and response; Arginine vasopressin (AVP) for love binding.
==> http://www.actionlove.com/cases/case16723.htm
He suspects she is cheating because of her vaginal enlargement. Causes and solution of vaginal enlargement.
==> http://www.actionlove.com/cases/case16316.htm
Her clitoris becomes numb by over-masturbation , as result of  scarring and abrading the clitoral nerves and tissues and narrowing and inflaming the clitoral and G-spot arteries for no sexual orgasm http://www.actionlove.com/cases/case16147.htm
Chronic Over-masturbation at 4 times a day resulted erectile dysfunction, penile shrinkage, inflammatory penile veins, and premature ejaculation for no more sexual orgasm; she cannot take this any more!
==> http://www.actionlove.com/cases/case15600.htm
Her dead vagina and his premature ejaculation are destroying their relationship and sexual orgasm
==> http://www.actionlove.com/cases/case15417.htm
His relationship is on the rock due to his short or soft penis or her deep vagina? Anyway, no more sexual orgasm
http://www.actionlove.com/cases/case12699.htm
On the Solution for penile, clitoral, G-spot and vaginal damage - the prevention and melting of collagenous scar tissue and the restoration of the erectile tissue for penile erection, vaginal tightness/narrowing, and sexual orgasm.
==> http://www.actionlove.com/cases/case11985.htm
On Repair of penile damages - varicose and spider veins due to collagen scar in the penile blood vessel and valve,  penile bending or crooking due to collagen scar, penile/testicular/groin/pelvic pains - for restoration of erection and sexual orgasm.
==> http://www.actionlove.com/cases/case12112.htm
Principles and mechanisms of the Natural Penile Enlargement - Ballooning Method for more erection and sexual orgasm
==> http://www.actionlove.com/cases/case9499.htm

He said ' She exploded! 14 days after quitting birth control, she finally had an orgasm... and it was a huge one. She initiated the sex act, which I was not even going to try again for a while. After everything was erected, I kept the rhythm steady at 2.5 hz. Within two minutes, she erupted! Thank you so much.'  with Dr. Lin's resonant excitation of sexual orgasm
==> http://www.actionlove.com/cases/case15250.htm
He said ' I've never in my life (that I can recall) had a "powered up" 2 o'clock erection until I started taking your supplements. Surprise surprise to my girlfriend when we made love my "viapal-hgh-p" powered up hard-on stimulated her g-spot/cervix like never before. It was fantastic - she had an orgasm! ... I am a believer in your products not only because of that but also because I was able to quit smoking too!'; Now, how to deal with the penile damage by the foreskin restoration device and practice.
==> http://www.actionlove.com/cases/case11051.htm
He said 'My penis has grown a full inch when erect and stays very hard now. My wife has cut back on her depression medicine since using viagrowth-IV, also she is horny always. Your herbs have turned on a switch inside of her that I cant even shut off. She is like a orgasm machine at age 37.' for more sexual orgasm.
==> http://www.actionlove.com/cases/case11035.htm
He said ' Hello, I was doing you ballooning method which has given me great results. Ive went from 5 to 9 inches. ' for more sexual orgasm.
==> http://www.actionlove.com/cases/case11024.htm
After her husband failed to maintain his erection for her, she is interested in dog sex for sexual orgasm. Can she have a dog tie? Dr. Lin's saddest advice! Updated (3/17/2004): She had experienced powerful multiple orgasms with the high-temperature dog penis and semen (3 degrees F higher than the human's).  Dog Sex can be a powerful therapy for urinary incontinence! Why?
==> http://www.actionlove.com/cases/case12137.htm
Clitoral size, testosterone, DHT, and sexual orgasm.
http://www.actionlove.com/cases/case10475.htm
She said ' My vagina seems very tight.' with our 5-HTP and ViaGrowth-IV. Principles of our vaginal tightness and penile enlargement formulas for more sexual orgasm.
==> http://www.actionlove.com/cases/case10129.htm
 He said "Heat Tea triples her G-spot size; what should I do for her sexual orgasm?"
He lost a 2 and 1/2 inch penis from chronic over-masturbation for no more erection and sexual orgasm ! - Why?.
http://www.actionlove.com/cases/case10303.htm
If you want to enjoy sexual orgasm, you must cultivate your love tools first:

Hysterectomy and sexual orgasm - solutions
==> http://www.actionlove.com/cases/case10252.htm
Birth control and clitoral/G-spot abrasion for no sexual orgasm.
==> http://www.actionlove.com/cases/case10027.htm
Death of the clitoris and G-spot for no feeling and, of course, no sexual orgasm - solutions.
==> http://www.actionlove.com/cases/case9845.htm
Why her G-spot is dead - no sexual orgasm.
==> http://www.actionlove.com/cases/case9733.htm 

Powerful water jets can damage penile and clitoral tissues and nerves - for Sexual orgasm?
==> http://www.actionlove.com/cases/case9609.htm
Damage of the urethral spongy tissues and nerves by a vibrator for no sexual orgasm
==> http://www.actionlove.com/cases/case9587.htm
He said ' This stuff is great for penis massage'; and for vaginal narrowing and penile ballooning; VIP Cream helps sex for more sexual orgasm
==> http://www.actionlove.com/cases/case10245.htm
Let DopaFibra and ViaPal-hGH-D maximize your brain-pituitary-testicular functions for a larger penis and more ejaculation volume with extra firing power for sexual orgasm.
==>http://www.actionlove.com/cases/case9441.htm
He said "Her climax started deep... then she shivered... like she was 20" with VIP Cream for powerful sexual orgasms 4 times.
http://www.actionlove.com/cases/case9425.htm
How the prolactin and progesterone levels affect sexual intercourse and orgasm
http://www.actionlove.com/cases/case9371.htm

Regulation of Yin and Yang Chi, associated with acetylcholine, dopamine, testicular functions, ejaculation control, wet dream, Penile/clitoral/G-spot enlargement, and sexual orgasm
==>http://www.actionlove.com/cases/case9179.htm
Neurophysiology of erection and Sexual Orgasm, and hysterectomy.
==>http://www.actionlove.com/cases/case9166.htm
Dr. Lin's Natural Penile Enlargement method help him grow an oversized penis for her sexual orgasm - Solutions for VAGINISMUS, penetration / intercourse pain.
==> http://www.actionlove.com/cases/case9148.htm
He said Heat Tea has jumped her sex engine for electrified, earth-movement sexual orgasm .
==>http://www.actionlove.com/cases/case9091.htm
The ultimate solution for depression, sexual exhaustion, impotence, frigity and better sexual orgasm .
==> http://www.actionlove.com/cases/case9089.htm
He said our products have made his g/f reach very powerful multiple-cycle sexual orgasm and himself enlarge his penis to 7 inches from 5.3 inches; he wants more for her!
==>http://www.actionlove.com/cases/case9046.htm
Entering the uterus for sexual orgasm? NO!
==>http://www.actionlove.com/cases/case9010.htm
He gains 2 inches with Dr.Lin's Natural Penile Enlargement Method for more sexual orgasm
==>http://www.actionlove.com/cases/case8902.htm 
She can only have sexual orgasm in wet dream; solutions for her tilted uterus and sexual orgasm.
==>http://www.actionlove.com/cases/case8958.htm
How to increase Orgasm hormone Oxytocin and reduce orgasm inhibitor Prolactin for more sexual orgasm.
==>http://www.actionlove.com/cases/case8745.htm
Why you experience weak erection, impotence, premature ejaculation or dryness/ frigidity (women) for no sexual orgasm
==>http://www.actionlove.com/cases/case8733.htm
Why your vagina cannot feel stimulation by a huge penis, no sexual orgasm!
==>http://www.actionlove.com/cases/case8696.htm
Hint for multiple orgasms: You should follow the "lovemaking procedures for multiple orgasms":
==> http://www.actionlove.com/cases/case7522.htm
to polish your love tool.
She said Heat Tea is really working for her sexual orgasm!
==>http://www.actionlove.com/cases/case8638.htm
Hooded Clitoris, Midlife shrinkage and sexual orgasm
==>http://www.actionlove.com/cases/case8582.htm
Cann't find the G-spot for sexual orgasm?
==>http://www.actionlove.com/cases/case8576.htm
Never too old to enjoy more sexual orgasm with Dr.Lin's Sexual ChiKong Practice 
==>http://www.actionlove.com/cases/case8573.htm
ViaPal-hGH-P or -E (ViaPal-hGH-D and -E more powerful) for more ejaculation volume and semen, more erection power and more Sexual Orgasm. 
==>http://www.actionlove.com/cases/case8416.htm
An erectile-drug user with high-blood pressure likes the full spectrum-hormone releaser for better sexual orgasm.
==>http://www.actionlove.com/cases/case8321.htm
An erectile-drug user said Dr. Lin formulas help him for better erection and looks for better control of sexual orgasm.
==>http://www.actionlove.com/cases/case8094.htm

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Any love problems, Ask the black-belt Sexual ChiKong(KungFu) Master, Dr. Lin. FREE! 
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Copyright (C) since 1997 Newman K. Lin, Ph.D., PE., All rights reserved.