As a group, sexologists are as seriously muddled as other scientists are.
Consider for example their debate over the existence of the G-spot, a “hypothetical” spot/area on the anterior wall of the vagina (facing the urethra) about 1/3 (between 1/4 to 1/2) of the way into the vagina, whose stimulation can produce multiple orgasms without a real refractory period (contrast clitoral orgasms), and even squirting orgasms, when the paraurethral glandular fluids are pressed outward.
The debate is easily resolved if one assumes that:
1. The G-spot does not exist as a permanent entity.
2. The G-spot appears when the woman has been sufficiently stimulated.
3. When a woman has been sufficiently stimulated, the spongy erectile tissue surrounding her urethra expands sufficiently to indent the wall of her vagina. This indentation is the G-spot/area, palpable on the anterior wall, between one quarter and one half way in from the introitus. Since the excited vagina varies in length from female to female, the absolute distance inside naturally also varies.
4. A woman who reports no palpable G-spot and no G-spot orgasms was insufficiently stimulated or seriously inhibited or both.
5. With more freedom from inhibitions (an alcoholic beverage can help here), and with a better physical, emotional, mental, and spiritual connection to her partner – one who is totally into her, who sees only her – the level of stimulation achieved for any given action/stimulus/technique is greater.
6. When sufficient stimulation has occurred to make the G-spot readily apparent, even intercourse can lead to orgasm, in spite of the fact that the motion of intercourse mostly rubs the spot because the motion of intercourse is primarily parallel (horizontal) to the spot, when perpendicular (vertical – that is toward the urethra, easily done with fingers and or devices) motion is more effective G-spot stimulation (this stimulates the urethral sponge, the clitoral nerve, etc.). Proper angling of the thrusts increases the perpendicular component of the motion, but this is hardly necessary given sufficient stimulation to make the G-spot readily palpable.
Armed with this information, we can see why some women say they cannot achieve a G-spot climax (inhibitions and/or insufficient connection with their partners) and why some sexologists deny the existence of the G-spot and the G-spot climax. It all becomes immediately understandable once one forms a proper picture of the process.