Forum highlights on Nipple vibrators:

How many nipple clamps do you own?
How many different nipple clamps do you own

Bell nipple clamps – nipple clamps
i want these but I'm worried they may hurt. How tight do they clamp?

Nipple Clamps for First Time Users
When using clamps for the first time, is there a guideline for how long you should/shouldn't wear them ?? Is it painful once they are off?

Nipple Clamps
Do guys typically find these attractive?

Dr. Z nipple pleaser – nipple pump
the reviews are not very good I think i'll try it anyway

I'm not sure what you are referring to - but there are companies that make non-piercing nipple jewelry. These often consist of a loop of flexible plastic that forms a 'noose' and a small metal slide to tighten the noose.

My wife has tried these with limited success. Her nipples do not normally stay erect enough to keep them on - after a short time one or the other will slip off. I suppose she could make them tighter - but I let her go with what she's comfortable.

Have seen the product but haven't used them. They look like bolo ties to me (and bolo ties != sexy).