Back in ASPD days, someone posted a link to a instructional video - in the "how to please a woman" line. It featured a female instructor (I think famous porn star) showing (with a younger woman) a pleasuring technique that involved kinda pinching/gripping the pelvic area and pulling up/away from the body. She then demonstrated a variety of techniques - thumping, tapping, slapping. It wasn't S&M (although I know it sounds like it.) It was reported to just be extremely pleasurable for a woman.
Does that vague description ring a bell for anyone???