As a female with an above average sex drive, who could go longer then her partner...these are absolutely essential and AMAZING! If you or your partner is sensitive to numbing sensations, then I would be cautious when trying it for the first time. My partner and I were given this (brand knew) and he and I thought it would be fun to try. Let me tell you, this thing comes in handy when your partner is getting tired and you want to go for another round. It truly works and I was pleasantly surprised how long it extend the time.
My dudes, if you need to extend your stamina - it works! Ladies, treat yo'self - this thing is sooooo incredible!