the motion that produces female orgasm during intercourse is grinding (pelvic rocking with sustained contact) not thrusting (in and out). the motion that porn taught an entire generation of men is the motion least likely to produce the result they are trying to achieve. thrusting produces male orgasm through friction on the shaft. grinding produces female orgasm through sustained pressure on the clitoris. the two motions serve different bodies and most encounters default to the one that serves his. the mechanism is clitoral contact duration. during thrusting, the pubic bone separates from her clitoral region on each outstroke. the clitoris receives intermittent contact: pressure, release, pressure, release. the nerve pathway builds during pressure and partially resets during release. the build toward orgasm is constantly interrupted by the motion designed to stimulate the penis. during grinding, the pubic bone maintains constant contact with her clitoral region. the bodies rock together in an anterior/posterior motion (forward and back, not in and out). the shaft stays mostly inside. the external pelvic surfaces remain in contact. the clitoral nerve endings receive uninterrupted rhythmic pressure. the build is continuous. the orgasm arrives because nothing interrupted it. the Shere Hite Report (one of the largest surveys of female sexuality ever conducted, with over 3,000 respondents) found that the majority of women who orgasm during intercourse do so through grinding or pressing movements rather than thrusting. the women who had figured out how to orgasm during sex had independently discovered that sustained pelvic pressure, not in and out motion, was the variable. the transition from thrusting to grinding feels counterintuitive for men because it reduces shaft friction (the male pleasure input). the compromise: alternate. thrust for his buildup. grind for hers. or establish a grinding rhythm as the primary motion and incorporate periodic deep thrusts for variety. the grinding should feel like a slow wave, bodies pressed together, hips rocking in unison. not fast. not aggressive. rhythmic and sustained. the CAT (Coital Alignment Technique, which increased female orgasm from 15% to 56% in published research) is essentially forced grinding: the man shifts upward 2 inches so that his pubic bone rests on her clitoral region and the motion becomes rocking instead of thrusting. the study that proved the technique was published in 1988. it proved that switching from thrusting to grinding nearly quadrupled the female orgasm rate. the answer has been in the literature for 35 years. the motion that most men default to is the motion optimized for male orgasm. the motion that produces female orgasm during intercourse is different. it is slower. it is more sustained. it maintains constant clitoral contact. and it looks nothing like what pornography taught you. grind. don't thrust. the female orgasm rate changes the moment the motion does.