Hitting the g-spot

I want to try fingering my girl friend some time soon and I want to make it as pleasurable as possible for her. I've heard that I can massage her G-spot while licking her clit and that will drive her absolutely nuts with pleasure.

How do I find the g spot, apparently it's about 2 inches into the vagina and on the upper wall. Will it be obvious when I hit it, like does it feel different or will she immediately react?

Also about how long will it take for her to have an explosive orgasm after I start? 5 minutes, 10 minutes? longer?

Thanks

>>12
Perpetuating that idea is akin to the sexual repression women faced for centuries, if not millennia.

Women (and men) don't need to be told that it's difficult and/or impossible to do something. Because then they tend to believe it and start spreading it around. You might as well keep on telling people that the female orgasm is a myth and that women are impossible to understand. I know you may mean well, but that's the effect it tends to have on a lot of people.

Young girls (as well as women in the past) and guys of any age are so impressionable about these issues that they'll screw up their chance of actually understanding and enjoying their bodies.