Dr. Oz explains the G-spot. What it feels like, where it's located, and what to do
with it once you find it.
Named after German gynecologist, Dr. Ernst Grafenberg who wrote about it in 1950.
When stimulated this little pleasure point is associated with deeper orgasms.
The male G-spot is the prostate gland, and is also associated with deeper orgasms for men.
Assorted toys are available for G-spot stimulation, and wikipedia has even given them their own page, here.