Bought one once, with other assorted things prior to a visit with an ATF. Never used it, though. Then I left it there and haven't bought another one since to try.

You know what's cool, if you're into that sort of thing? Got this little vibrator. It's about the size of your pinky finger, from the knuckle to the tip. Have her stick it up your ass while she goes down on you.

Seriously! Feels cool!

It can also prevent you from ejaculating. I have a client that uses one and thats his biggest complaint. It prolongs his erection because it doesnt let the blood flow out of your penis. But it can also prevent ejaculate from flowing out, too.

your can get them at wal-mart, they dont make you last longer though as it adds another sensation, but the girls seen to like it.