Those lil' tramps..
This cut & paste is from, check this, a REDBOOK online article. Those women will do anything to become more orgasmic! I wonder if they’ll ever have an article on how to deepthroat?? heh
Unleash Your Uterine Muscles
The uterus is a hollow pear-shaped muscular organ, and uterine contractions can enhance your climax, says sex therapist Barbara Keesling, Ph.D., author of Discover Your Sensual Potential. If you can control your uterine muscles, you may be able to pull the uterus up during sex, thus exposing the cul de sac, the very end of the vagina, to penile thrusting. “The cul de sac is a very sexually sensitive area for women, many of whom report almost instant orgasm when this area is stimulated during intercourse,” says Keesling.
Toning tips: To locate and identify your uterine muscles, get into the classic bicycling-with-your-legs-in-the-air position. This bottoms-up pose causes your uterus to settle on top of the vagina. When you return to a lying-down position, you may feel air moving out of your vagina. That is the sensation you want to re-create by tightening your lower abdominal muscles, which are right above the uterus. As you tighten these muscles, imagine that you are inhaling and exhaling through the vagina. This flexing and relaxing allows you to open up your cul de sac during intercourse. Contract and relax the muscle 10 times, once a day. (Any position will do, but lying down is probably the easiest.)