Understanding the G-spot

Wikipedia is refreshingly realistic about the lack of factual evidence: "The Gräfenberg Spot, or G-Spot, is a controversial term used to describe the area of the female vagina that might contain an erogenous zone which when stimulated can lead to high levels of sexual arousal and powerful orgasms. Although research on the g-spot has taken place since 1981, arguments over its existence, the actual definition of the term, and its location continue to control discussions in the medical field as well as in studies of sexuality."