Everyone's butt play preferences are different, of course, but if you're a fan of prostate (and anal sweet-spots in general!) stimulation, we're betting that you'll adore Selopa's P-Spot Trainer.
Up top, the Trainer's tip is swollen, silky, and ready to seek, find, and (very!) deeply stimulate prostates/butt-located hot spots in general. It's slightly flexible for easy adjustment, and the big base below stops the Trainer from slipping too far.
One speed of reliably steady vibration comes courtesy of an embedded bullet. One button turns it on and off.
The pure silicone Trainer is body-safe, easy to clean with mild soap and water/your favorite toy care fluid/foam, and it's good to go with any water-based lube you love. The Trainer takes a AAA battery (sold separately). This vibe isn't waterproof, so please keep it on dry land.