In the world of orgasms (sounds like a great place, huh?), if a woman's best friend is the clitoris, then the G-spot is that friend who comes to town less often—but makes for a freakin' unforgettable night when she's here.
Essentially, the G-spot orgasm is less reliable, but it's oh-so-good when it shows up.
FYI: Your G-spot is actually part of the whole structure of your clitoris, which extends three to five inches inside you along the vaginal canal. (Get your full lesson in female anatomy here.)