What is it supposed to do? Sounds unpleasant.
Once the blood rushes into the penis the ring slows down the flow of it going back, allowing for bigger and longer-lasting bigger penisier penises.
It's science
I'm not sure I believe that, and restricting blood flow doesn't sound like a good idea at all.
You should spend more time getting to know your own body.
I kind of like my body and the time I spend with it doesn't include endangering my special member.
In all seriousness, I did some research, and the ring seems to have some medical merit. Although I did find that priapism can happen, but the figures were varied whether it's more likely to happen from viagra or the ring. Anyway, not something I'm likely to try.