It's basically the same as the woman's G-Spot, except the A-Spot it can be reached by penetrating the anus and going about 2-4 inches up until a small bump is felt. The A-Spot is found right next to the prostate gland. It is very sensitive, as is the prostate. It's very pleasurable for males.
The male got it in the ass and had the best orgasm of his life.