I've had an MGX for a couple of months and my experiences have been somewhat different from what people describe on the board, however, after I got the hang of how to make my Aneros work for me, it's been great.
I am 6'4" at 200 lbs, myself.
You mention getting some sensation out of repeated clench and release type of action. This is something I tried early on and even though I experienced some new, sometimes pleasant sensations this way, it never built up to anything great. For me, it is all about finding my sweet spot and keeping the Aneros there; any excessive movement will only spoil the mood.
The position that works best for me is lying on my stomach with my ankles together, sometimes crossed. When I was first learning how to use the Aneros, I would do the breathing exercises -- inhale while slowly contracting muscles, exhale while slowly relacesing -- and it seemed to help me get in the right mood and focused on how things were feeling in there. These days I go straight to business which goes like this:
I contract my muscles extremely slowly to move the Aneros in and focus on how it feels. When it touches my prostate in a way that feels great, I stop and hold it there. I imagine the tip of the Aneros massaging my prostate gently in little circles, without making a conscious effort to move it. Sometimes I imagine my prostate rubbing and throbbing and pulsating against the Aneros. Eventually the feelings I am getting start to fade and I move on to find a new sweet spot, either by contracting my muscles some more, or by relaxing them a little.
The perineum tab doesn't seem to be touching me in any particularly interesting spot. Seems like even if I bent the tab as far as it goes, it might still not reach the area between my anus and penis that I know to be particularly sensitive. As a matter of fact, the perineum tab doesn't always touch me at all. Even after I cut off the handle of my MGX (for the purpose of making it more comfortable to wear lying on my back, sitting, or clothed), the P-tab is often just floating there. Whatever I am getting out of the MGX seems to be entirely due to what it does internally and has nothing to do with the P-tab.
As far as leakage and P-tab misalignment goes, my Aneros stays more or less straight even without having a handle, and with the P-tab not making contact. I lubricate relatively conservatively. I initially got the impression the more lubrication, the better, but I tend to disagree now. I used to use a combination of a thick coat of Vaseline on the Aneros, and an insane amount of Astroglide applied rectally with a syringe, but that's just a lot of extra work and mess for nothing. These days I spread Vaseline on the Aneros with my index finger, plunge the finger in my anus to get it ready, and insert the Aneros, and I am shaking uncontrollably with pleasure within first couple of minutes, and climb to indescribable experiences from there without a fail. Maybe if you used a little less lube, your Aneros would be less likely to not stay straight, and its tab to stay dry.
Another deviation from the norm, or what people generally describe here, I have is, I get no increased pre-cum. I do get pre-cum when I am sexually aroused for a while, but unlike what I've read on this board, the Aneros doesn't increase the amount of it at all -- almost on the contrary. However, when I ejaculate after or while using the Aneros, the volume I get then is clearly more than usual.
-R
