Nipple pumping

[MrTeacup]

My wife has started pumping her nipples.  Is there anything simiilar to a cock ring that she could use to prolong the effect of pumping?<br><br>Any other advice on stretching out those nipples or keeping them hard would be appreciated. <br><br>Thanks.

[bigpig]

We use simple rubber "O"-ring what using to water mounting. Various diameter size ...- 6 - 15 - ... millimeters, and 1-3 mm thickness.<br>Good and cheap, non-allergic (silicone)<br>I place to half erected nipple, and after pumping to max.

[Pumpy]

There are small elastic bands and rubber rings on the market to keep a nipple erect, but be careful, if the pressure is too high you can actually stop the bloodflow to the nipple...<br><br>Or increase the bloodpressure in the nipple to bursting point!