Ben Wa Balls are a great kegel exerciser.

To do this, insert the balls one at a time into the vaginal opening, sliding them past the first set of kegel muscles (where the vagina will close around the balls). Squeeze the muscles lightly after insertion so the balls stay inside even while their weight pushes down and out.

When using with a dildo or during intercourse with my husband, I kept insertion and thrusting slow so to not press the balls painfully against my cervix and, in turn, bruise myself.

I would not recommend using the balls anally as there is not a retrieval string or a string attaching the two, which can cause problems retrieving them for some users.

Pyrex glass is a great material for sex toys, in my opinion. It's easy to clean, I just use a dish soap I trust and water. Its smoothness also allows for easy cleaning and use. The glass also has no odor.

The strength and rigidity of the balls allows for a great feel when the balls are used solo but can bruise if too vigorous when adding a dildo or sex partner.

The size of these balls are perfect. They fit inside my vagina easily, which is great as even my partners have stated how small and tight I am down there, but they are large and heavy enough for me to feel when moving or doing kegel exercises.
Also, the size, even with the quaint box they come in, is perfect for slipping in my purse for on the go or setting on my nightstand to blend in among my books, cell phone, alarm clock and other clutter there.

The balls are pretty basic in usage. Insert into the vagina and slowly move them around inside using kegel muscles.
If using a dildo or, like me, adding them to intercourse with a partner, insert the dildo or penis slowly and be gentle when thrusting. Thrusting too heavily or quickly can cause cervical and vaginal bruising as the balls are hard glass with no give.

The balls are made of Pyrex glass, which make it super easy to clean. Simply wash with preferred dish soap and water. Store in given container when not in use.
If using a lubricant for insertion or play, any water or silicone based lube is compatible with glass.

I love the cute little box these come in. It looks like a jewelry box and blends in whether it's on my bathroom sink, dresser, nightstand or in my purse. The few people who have seen it have never taken notice.

I have been wanting these balls since I had read about kegel exercises and women's health. I was later told by a friend who uses very large dildos that she was tighter now, after using these and an egg, than when she was using small toys. This really intrigued me so I knew I just had to have them.

When I was using them my husband was watching me for about an hour, as if he expected me to burst into spontaneous orgasm at any moment...I guess he did his research on them too.

The first time I used these balls, I inserted them early in the morning to use all day. After an hour of walking around, just slowly sensing how the extra weight in against my vaginal opening felt, I sat down in front of the tv and began moving them around as discreetly as possible. My partner had been watching all morning and loved being a voyeur when I orgasmed seemingly spontaneously. I was surprised at how good these little marble-like balls felt and grind against my g-spot perfectly.

They are easily wearable all day and can deliver a pleasant grind anywhere including the couch, car, work, school, etc.

When using with my dildo, I was sure to use one with a soft silicone. This felt nice but I was not a fan of how easily I could hurt myself by pushing the balls too vigorously against my cervix.

The only issue I had is getting the balls out before using the bathroom. After some experimenting I have found I can keep them in if I concentrate on which muscles to tighten but it took some time. The last thing I wanted was to flush these magnificent toys down the toilet.