Vibrating Female Powerful Suction Nipple Breast Enhancer Vacuum Pump Cup

It's powerful, but it left my nipples sore and almost bleeding. The rubber nubs are too hard and rough.

Sensations from using this "toy" are interesting if not particularly erotic. However, the other reviewer preceding me here is correct. I found that the play was fun, even better when I held the cups close to my breasts, and not at all painful, but as soon as I stopped (after maybe 20 minutes?) and put the toy away, my nipples were sore as they had never been before. Two hours later, still sore; after some 20 hours, the pain had diminished but not yet gone away. I noticed then that the vibrating cups had not only bruised but also abraded the skin on my nipples. I've sent for some healing lotion to treat them as a result. I plan to be caring for my breasts very gently for the next few days. If you're not used to pain or don't want to feel pain, be very careful or stay away from this toy. It's dangerous. Initially I gave it two stars because it seemed to merit something for the not-unpleasant sensations while operating, but the damage to my nipples changed my mind: I'd give it no stars if I could.