As the title says really do cock rings make you last longer before cumming I know they keep you hard but do they delay things a bit.
I have a normal cock ring and have to say that it does make me harder and makes me last longer. I am hoping to try the Lux LX4 Rechargeable Silicone Cock Ring in the near future.
http://www.lovehoney.co.uk/product.cfm?p=5276
We've had a lot of fun with that one, odd sized batteries though.
http://www.lovehoney.co.uk/product.cfm?p=20531
Got that one as well, but very worried it'll be like playing conkers with my balls so not actualy tried it yet
Cock rings are great - they always increase size, firmness and longevity of the erection (whatever you size or staying power)
Some of the buzzing / tickling / caressing ones, however, might be even more intense, so end up tipping you over quicker... I always find that anything with a ball buzzer has me gone in minutes once switched on!
This one is great: