GF enjoys a blindfold and homemade bi-polar anal electrode along with a single pole vaginal insert, the other connection to the clit or a pad above the clit. The device is a homemade stim unit that plays MP3 files from smartstim dot com. Her favorite is a hour long session that starts with low pulses on the anal trode creating a in and out stroking. Actually you can watch the muscles pull the plug in and then relax. This goes on with varying intensity (softly then harder then softly ETC) and suddenly the vaginal will buzz like a vibrator set on very low intensity sort of like in the background as the anal pulses continue.
Now this session file runs pretty much automatically so MY job is to massage legs, breasts, neck, kisses, encourage her fantasies and watch this fabulous scene unfold.
Back to what is happening to her: This particular MP3 file will vary the intensity and rate of vibrations bringing her close to a finish then dropping back to less intense feelings, never knowing exactly when the next vibrations or pulses will be on the pussy or the anus. (I tend to change the file slightly between visits). Sometimes I may take something and lightly tap the inserts just to hear her reaction.
Sometime she will have several orgasms in which case I manually lower the intensity or even start the file over from the beginning. Great times, always.
FOR ME I enjoy watching her insert my modified Aneros bi-polar anal insert for channel 1 and conductive rubber tubeing at the head and base of my dick connected to channel 2.
I have so many favorite MP3 files she can choose from I never really know what is going to happen, but they are all good.
It is a rush when big boy starts to wave in the air in time with each pulse of the file, he looks like an orchestra leader. The anal insert will stroke the prostate causing lots of precum. It is series of great feelings especially when the GF will massage, kiss and take retribution for my unexpected nipple tweaks, well you get the idea.
One last point after the last climax, after the last orgasm, after there is no more baby batter and the stim box is turned off the buzzing and pulses just continue kinda in the background for both of us.
Skybear