Sex advice: Help! I can't find her G-spot

I’ve been with my girlfriend for three years and I have not found her G-spot. It’s not for want of trying. I would really like to know once and for all: Does the G-spot even exist?

This question has divided science for at least 40 years. In the 1950s the physician Ernst Grafenerg identified the existence of an area of heightened sensitivity in the vagina — but the term G-spot wasn’t coined until 1981, by Dr Frank Addiego. He published a case study in the Journal of Sexual Medicine describing how a woman had learnt that stimulation of an erotically sensitive area on her anterior vaginal wall led to a much deeper orgasm.