Penis rings to prolong an erection?

Constructive discussions on Cock rings:

What do cock rings do?
I know what the vibrating one are for, but what are the plain rings for? i feel like such a virgin asking this question but i am so confused with them

Bringing in a third person
I would love to bring a women into our bedroom (I'm bisexual and he was a virgin when we met so YES we both would love to share this) BUT I don't want

Phone Ringtone?
Just curious to hear everyone's phone ringtone. I thought about it because mine is starting to get really annoying and my phone, while a Droid,...

Toy to leave in during sex
One of the better sensations I've experienced was normal sex with vibrations, with an anal vibe. Does anyone know of a good anal vibe that would stay...

Do you ever wear a vibrator during the day?
Do you ever wear a bullet or vibrator during the day under your clothes? Would you do it as a kind of secret foreplay on date? Just curious!