Elisabeth Whispers mentioned something called "Pelvic Tilt" in her Blog on her website. In an effort to google it, I came across this interesting page:
http://www.womansday.com/sex-relatio...tuation-105837
Another mention of Pelvic Tilt:
http://www.cosmopolitan.com/sex-love...y-sex-position
A position I wouldn't mind trying.
Here are some exercises for Pelvic Tilt to help enhance sex:
http://www.sensiblefitness.com/files...erformance.pdf
...and, an article about "working the angle" for better sex, including the use of a "liberator Pillow". (apparently a 27 degree angle works best:
http://www.menshealth.com/mhlists/se..._the_Angle.php
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Love sees, not with the mind, but with the heart--Shakespeare