Vibration – Session tips for newb

Hey all, I am pretty experienced with butt play and have used dildos for a long time. When I stumbled upon the aneros website I laughed when I read about the super – T as it is what got me interested in dildos in the first place. I found that if I hit the right spot and manipulate it just right I get really intense waves of pleasure. No orgasm though.

Of course in hear about the super-o and got really excited and purchased a vibrating model.

So, in my first few sessions I have gotten some really incredible feelings – I have tried the vibrations on max and min – but sadly no true orgasms. Part of the problem is I tend to start kind of grinding my hips against it, which it seems is counter productive from what I've read.

Sorry for the above just looking for feedback, now on to the question:

When using the vibrator do you leave it on? Is it better to begin without it as a newb? Can it desensitize?

How bad is the grinding?

Thanks in advance.