3D MODELING AND SIMULATION STUDY OF CLITORAL STIMULATION IN 12 SEXUAL POSITIONS

Abstract Objectives A notable disparity exists in orgasm frequency during sex between heterosexual men and women, with many heterosexual women unable to reach orgasm through vaginal intercourse alone. The clitoris is essential for female arousal and orgasm, with its glans sensitive to light touch, friction, pressure, and vibration, while other parts respond to stretch, pressure, and displacement. Factors that may increase orgasm frequency, especially in women, are not well understood. This study aims to evaluate stimulation of female erogenous structures during common sexual positions by recording pelvic movements in a standard male–female couple. Using CAD models with attributed tissue properties, we simulated the pressure exerted on the vagina and clitoris to predict potential clitoral stimulation across positions. Data from these recordings were integrated with 3D pelvic and sexual organ simulations to assess how various positions affect clitoral stimulation. Methods Motion capture of the pelvis and legs were carried out on two volunteers (married 1 female, 1 male). The volunteers were asked to perform 12 common sexual positions under the supervision of researcher experienced with motion capturing. The pelvis positions were quantified for each volunteer’s hip during all 12 sexual positions. The model of the bony pelvis, clitoris, penis, glans and testicles were created using a 3D modeling software. Pelvis position data of sexual positions transferred to 3D animation software. Pressure maps were then calculated in SOLIDWORKS using the “Interference Detection” function. Results It was observed that clitoral stimulation through contact with the pelvic bone occurred in positions 6 and 7, where the man is on top, and in positions 10 and 11, where the woman is on top, with significant contact pressure detected in the pressure analysis of pelvic bone stimulation. In position 3, stimulation was observed to occur primarily through contact with the testes. Conclusions Our modeling and simulation based on real motion data, we concluded that clitoral stimulation could be greater in positions where the glans clitoris is under pressure from the pubic bone and/or the testis, and these positions may facilitate female orgasm. Conflicts of Interest The authors declare no conflict of interest.