I spent a couple of hours this morning. The session was similar to the last one. The main difference was that I got a lot more body spasms. In the past, I would get little twitches here and there. This morning, I had several occurrences of extreme shaking. Two times, my right butt cheek and leg violently spasmed for about about 30 seconds or do. I also felt stomach muscles quivering which I never had before. These spasms were not accompanied by increased pleasure though.