Why can't I find rotating dildos that can be plugged into the wall?

Helpful topic info on Rotating Dildo:

Rotating vibrators
I love rotating toys, I'm looking for a strong one though. Any suggestions?

Rotating vibrators
What's everyone's thought on these? I've only ever used one before, and it shorted out on my first use. Anyone have any suggestions or preferences?

Rotating Vibrators
My boyfriend brought up a vibrator that he saw that sapposivly rotated a lot, like Ive shown him a video of a rotating jack rabbit in the video link..

Which Rotating Vibrator is Best?
If you had to pick which you liked most which would you pick?

Bearing in mind that I have never used a rotating vibrator and I like strong...

Rotating shaft-love it or hate it?
I'm just trying to decide if I want to try one and would like to see how many people like vibrators with the rotating shaft. Soooo, do you love or...