Hey Firegoat, I found some stuff online maybe it will work.
“As I mentioned before, our sexual organs and bladder share the same muscles running from the pubic bone to the tail bone. These muscles not only support the weight of bladder and women’s uterus, but also affect the men’s ability of controlling ejaculation and the women’s vagina strength. For men, contracting these muscles can reduce, or even stop, the semen flux when ejaculating. For women, contracting these muscles can accelerate sexual response to the pressure waves generated by the penis. If women can synchronize the vagina contraction with the penis-generated pressure waves at a period of 0.4 or 0.8 seconds per cycle ( or at a frequency rate of 2.5 or 1.25 cycles per second) during intercourse, the uterus can be tuned into natural contraction in less than a minute. This is a part of Sexual ChiKong practice during sexual intercourse. That is one of the major factors that make the Method of Resonant Orgasms so effective for women to achieve multiple orgasms in a short time. The Method of Resonant Orgasms will force the woman to contract the vagina to synchronize the penis movement inside the vagina. The importance of theses muscles for women is very obvious.
These muscles have been ignored by those who do not practice Sexual ChiKong. In fact, you can exercise these muscles every time you go to the rest room. When you urinate, exercise the muscle between the urethra and anus by a sequence of stopping urination, holding it for several seconds, and letting it go, for several (10 or more) times; this is very important for both sexes to retain the muscle strength for sexual intercourse and urination continency after middle age; Pictures in (A) of the following figure, urinatin.gif, show an example for the movement of the muscle around the female sexual genital during the urination exercise. Women should use their low-abdomen and vaginal muscles to practice this exercise. Men should practice deep contractions of the muscles around the prostate, anus and tail bone without contracting the abdomen while urinating. Incorporating this Sexercise, denoting “Sexual Exercise,” into your daily life can tone your sexual muscles for a healthier life.
Picture (B) shows the joint Sexercise with a deep mediation to recharge their parasympathetic nervous system for mutually massaging their sex organs or for initiating their sex organs for intercourse. The couple should lightly close their eyes with deep, but relaxation, breathing. The woman should use her low abdomen to deeply contract her vagina muscle while inhaling and release the contraction while exhaling; the man should initially focus his mind to the central point between two eyebrows, descend it to the prostate along the Conception Vessel while exhaling, and then move it across the anus to the spinal cord and the Governing Vessel and back to the head while inhaling with a deep contraction of his tail bone muscle as if the anus takes a deep, long breath. This practice should last for 5-10 minutes or until the vagina is well lubricated. The coupling should also incorporate an erotic kiss with the Sexercise to interconnect their bioenergy circuits as shown in figure kisspwr. Gif of Chapter 6.
The man can use this Sexercise to delay his ejaculation during intercourse when he is in a passive role or in a steady state. In fact, this is an extensive application of the Anal Breathing Method.”
That was on one of Dr. Lins sites. Could it be useful? Thanks