I enjoy positioning myself on my ottoman on all fours. I raise my ass up and keep my shoulders down. I have a small 4-inch vibe that I insert in my pussy on #2 (out of 3 speeds). Then I gyrate my hips slowly and enjoy the buzz. As I orgasm the vibe usually slides out. The challenge I have is to try to hold it in as I hit the big O.
A funny side note to this technique happens once in a while. If the vibe falls out of me and I don't recover it in time, Rita, my Maltese grabs it and runs out of her doggie door. This chase usually ends with me throwing on some sort of clothing and following pursuit. She always runs behind a particular bush located on the back corner of our house and pretends to hide. I've sometimes wondered if any of the neighbors have seen her running outside with her pink plastic buzzing play toy.