Useful topic breakdown on Cock rings:

Which cock ring do you like?
which cock ring did you like. Both guys and gals can respond.

Looking for the best cock ring...Suggestions?
My husband and I have recently discovered cock rings and LOVE them. We have tried a couple vibrating bullet rings but would like to get a nice one...

Best Into Level Cock Ring?
What would be a good cheap safe material, preferably silicone entry level cock ring?

Having to Pee during sex...
Within the past year I noticed I have to pee during sex while we are in certain positions after a short period of time. And yes I actually have to go,

Silicone for manufacturing sex toys
Hey everyone. I am trying to get into manufacturing silicone sex toys. I have a number of super-cool clay models sitting in limbo because I haven't...

yes, keeps "it" up

yeah, makes it harder and more sensitive

Yep. It keeps me hard even longer

For me it tends to make everything swell up a bit bigger and force veins to pop out a little bit more giving me my cock an extra bit of texture. They tend to cut off my circulation a bit though and it's really hard for me to cum by wearing one. I'd rather go ball-stretcher than cock-ring.

We've tried one a few times, a vibrating one. It did add something for both of us (it has a vibrator for the clitoris and one for the balls) but not enough to be a regular thing. I don't generally have a problem keeping it up though (not yet in my life anyway) so that aspect isn't really important for us.

I've never used a cock ring with someone's actual cock, but I do love to use them on my non-vibe dildos to add a little vibration every once in a while.

I've used several different kinds, and the majority of the ones that you might buy from an adult toy store are for aesthetics rather than function. Now granted even a nice looking one from a toy store, if it is properly fitted may indeed actually help to help keep an erection, but not like the medical ones.
After having had a bit of trouble in that area myself and my doc prescribing a pump and tension rings I've had some experience with the real deal.

I'm fully recovered and no longer need it, thank you very much.
But the experience was indeed rather enlightening. The tension ring is the medical name for a cock ring that really functions. It functions by really squeezing the cock, oh and by the way the medical tension ring only goes around the base of the cock not behind the balls like the majority of aesthetically attractive cock rings do. After my first try I researched larger size tension rings and picked up the largest I could find, still quite a squeeze. And to say squeeze is really putting it mildly, it's so tight on your cock that it is literally painful. Additionally, it says in the instructions not to leave it on more than thirty minutes or injury may result. No joke I left it on a little too long and it bruised my fucking cock.