Genital blood vessels dilate. Blood rushes to the vulva, and fluid passes through, increasing vaginal lubrication. The heart rate quickens. Breathing is faster. Blood pressure increases. Even breasts enlarge due to blood flow to the areola, the area bordering the nipple. The clitoris seemingly disappears as it retracts against the pubic bone. All of this happens simultaneously, including genital muscle contractions roughly .08 seconds apart. How long does a female orgasm last? Anywhere from around 13-51 seconds. And then the body returns to normal.
There you have it. Maybe the journey to orgasm is the destination.