A few weeks back, someone posted about butt plug training. Since my KH isn’t keen on anal play at all, it’s been ages since I last enjoyed it. Still, that post made me recall something from college. Back then, I had a girlfriend who was open to almost any sexual experience. One day I proposed we try anal intercourse, and she agreed as long as the feeling went both ways. I laughed, thinking she wasn’t serious, especially since we were both experimenting with bondage (I like ropes; so did she) without taking it too seriously but having plenty of fun.
Anyway, to cut a long story short: one day she bound me up so my feet touched and were secured tightly, with a slender dildo positioned between them pointing toward my anus. Lying on my back, she then tied my wrists to my ankles, pulling the plug (and my feet) inward until it penetrated about three or four inches deep. Bound like that, I couldn’t reach her or myself, so she teased me mercilessly but wouldn’t let me cum. AND here’s the kicker and my question…
When I brought my knees together (lifting them from my sides while keeping my feet flat on the bed), my legs would spasm violently. The shaking was intense enough to make my hips vibrate. She had me lift and lower my knees, and each time they hit a specific spot, the spasms returned. It felt incredible, and when she finally allowed me orgasm with everything going full tilt, I nearly fainted from the rush.
So here’s my question: What causes this uncontrollable twitching/spasming? Did anyone else experience it too? Knowing some of you have medical backgrounds, maybe you can explain what triggers this reaction. Thanks in advance, Justplaying