For providers and clients, NOTE the last line in this paragraph. Thrusting should not be part of the massage! I've had this done 4 times, twice correctly and it was good. Gentle pressure applied in a circular motion. Both successful times the provider knew I was about cum before I did. She was able to feel the prostate swell. If not done properly it can be painful and dangerous. Ask your provider about her technique.
A prostate massager is a device for massaging the prostate gland, mainly for sexual purposes. The shape of a prostate massager is similar to a finger, since prostate massages are traditionally given digitally (for example, via fingering). They usually have a slightly curved head to effectively massage the prostate. Lubricant is usually inserted into the anus. A prostate massager should be used with care because of the sensitivity of the prostate.
Correct use involves a medium to light repetitive massage, or circular motion—the tool should not thrust.