For those who are unfamiliar, a Sybian is a super duper expensive ( I think they are over $3K.) ridable sex toy. I looks a bit like a pommel horse from high school gym, but lower. From the top, you can mount all sorts, and sizes of dongs, and phalluses, including various doubles for anal and vaginal play simultainiously. The dongs stroke up and down (adjustable for depth) and move around, and vibrate.
I have put this in the anal toys category, because I don't do vaginal. It works equally well vaginally, but I did not try it.
For my first ride, I chose a pretty big dong, two inches by about eight. The girl who knew the machine well did not expect me to lube it up, and sit down with it up my ass! She looked bewildered. I started with very slow, shallow stroking, cause being unfamiliar, I didn't want to hurt myself. Ok. This is good...I closed my eyes, and adjusted the speed and depth to long slow strokes, and just let it take me away. I'm not a fan of vibrating anything, they make my butt numb, but the oscillating (round and round, or back and forth, or random) feature had me climbing the walls. I started coming, and coming and...When I couldn't stand anymore, I got off it, completely weak in the knees, and fully satisfied. I was amazed. I'm not sure if it was one orgasm, that flowed in and out, or multiples, but it was new to me.
Expensive, hard to hide from visitors, and a lot of cleaning and disinfecting, but considering I was just a visitor, it was all that, and more.