A G-spot massage (GSM) refers to a massage of the G-spot. This technique is used for intense vaginal orgasm.
More About G-Spot Massage
A G-spot massage is the process of massaging the G-spot until climax. It is considered to be the equivalent of a prostate massage. Massaging the g spot to climax results in very intense orgasms. This can be performed during masturbation or with a partner.