If you have a hard erection,  please read:
http://www.actionlove.com/extra/relate.htm#s
http://www.actionlove.com/extra/relate.htm#p

Then =>
You may be able to have multiple orgasms without ejaculation (termed as Dry Orgasms) when your heart pumps at a rate below 100 (75, preferred) beats per minute (this is the most critical factor!), the blood pressures are below 150/100, and you breath rhythmically and deeply at about 4 times per minutes (about 15 seconds for a breathing sequence of short step-wise/digital inhaling at a rate of 0.8 second for 5-10 seconds, holding breath for 3-5 seconds, and slowly exhaling for 2-5 seconds) during intercourse.  Heart rate and blood pressure will alternate your brain's sympathetic function associated your ejaculation control.  To prolong sex, you must put your brain and heart function in the parasympathetic mode, that is,  let your mind  do nothing,  but guide the circulation of your sexual energy along the Governing and Conception Vessels of the acupuncture network.   

The Key: Apply a light pressure against your bladder, lightly expand your low abdomen, lightly contract your tailbone muscle between the anus and tailbone at about at a rate of 0.8 second (this is the natural orgasmic contraction rate) All The Time in the suggested breathing sequence above; ascend your mind from the tailbone to your rear brain along the spinal cord while inhaling;  focus your mind onto the rear brain first and slowly move your mind to your third eye between your two eye bows  while holding your breath, and then descend it down to your prostate along your Conception Vessel - the central line of your front body while exhaling.  Always keep a slight pressure against your bladder to relax your prostate even when you exhale.  You will feel your tailbone muscle is vibrating during the off-line (non-intercourse) practice - do it anytime when your body is in relaxation. During online (intercourse) practice, the vibrating tailbone muscle will pace orgasmic contraction across the anus toward the prostate muscle and penile shaft once the tailbone muscle traps sufficient sexual energy. If you don't know how to practice this advanced Sexual ChiKong, go to read http://www.actionlove.com/love/chikong.htm first.

==>http://www.actionlove.com/cases/case8606.htm

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Dr.Lin's Sexual Chikong let him experience sexual orgasm induced by Tailbone muscle contraction without semen ejaculation and prostate contraction!

Premature Ejaculation (PE) is caused by a supercharge of the bioelectric cells in the prostate's Autorhythmic Fibers at the Ejaculation Control Valve due to the hyperactive sympathetic, sexual motor nerve. 
GENERAL Causes: 
1. Too much testosterone and dihydrotestosterone (DHT) bounded to the prostate's hormonal receptors (temporary prostate excessive enlargement during sexual excitement) - when your penis is erected, so is your prostate enlarged temporarily! Young men have too much testosterone; middle agers and seniors have too much DHT accumulated. 
2. Contracting the prostate to assist erection - as a result of weak erection!
3. Masturbation Training of the Sympathetic sexual motor nerve for the fast ejaculation release - The martial art trains the hands or legs in fast response to visual or auditory stimulation. Masturbation trains the prostate to ejaculate as fast as it can in response to visual and auditory stimulation.
4. The Weak Parasympathetic sexual motor nerve (lower resting (DC) potential) unable to keep the Ejaculation Control Valve shut! This problem is also associated with weak erection, resulting from over-masturbation, over-ejaculation, medication/street drugs, alcohol, smoking, and natural aging. 

The General Solutions are:
0. Ground zero solutions - Plant hormones (including Isoflavones) can help free testosterone and DHT from the hormonal receptors to prevent the prostate from overheating and overenlarging during sexual encounter!
1. Shrink/Cool down your prostate and re-power your penis - you have to balloon your penis to an extreme; You need a lot of testosterone and DHT circulating into the penile and prostate tissues to actuate the penile ballooning effect, but you don't want them to be bound there!
2. Interfere your sexual response with Dr. Lin's Tai-Chi Yin-Kong Breathing or Anal Breathing Methods during intercourse - apply the ChiKong Breathing to intercourse;
3. Adopt the defense-attack (Tai-Chi Horse-rider) posture which is also the 90-degree rotation of Dr. Lin's 3-point Excitation Position;
4. Use the high attack angle to approach the G-spot and Epicenter, and avoid stimulation of the male trigger zone, and constantly change the love position to the 3-point Excitation Position whenever you are over excited.