What is it? Where is it? Much has been written about the G-Spot and some have even disputed its existence. But for those women who enjoy them, orgasms from G-Spot stimulation can be a pleasurable part of sex play.

The G-Spot is named for Ernst Gräfenberg, the gynecologist who first identified it through sexual studies and reported on the mysterious spot in his paper, The Role of Urethra in Female Orgasms. It can be found by touching the front wall of the vagina (same side as your belly button), about one or two inches inside.

Scientists aren’t quite sure why G-Spot stimulation is pleasurable to women, or what exactly it is that’s being stimulated, making it somewhat of a mysterious part of sexual arousal. Some scientists believe that G-Spot stimulation is pleasurable because when the front wall of the vagina is stimulated, the interior branches of the clitoris (the crura) are indirectly being stimulated. Others suggest that G-Spot stimulation results in stimulation of the urethral sponge, which is an area of tissue that surrounds a woman’s urethra (the tube that carries urine out of the body).

However, one thing is clear: Whatever it is that is being stimulated is, for some women, a very pleasurable part of sexual play.

Some women who have felt their G-Spot describe feeling a rough area of flesh, roughly the size of a quarter. Others don’t notice anything that feels different to them, but they feel pleasurable sensations during exploration. G-Spot stimulation often responds to gentle but firm touch, and some women find that G-Spot exploration is more pleasurable if they or their partner stimulates their G-Spot while the woman is lying on her stomach. All women have a G-Spot, though not all women respond to G-Spot stimulation the same way. Experimentation is the best way to figure out what type of G-Spot stimulation is right for you.