Sexologists often describe the process of female arousal and orgasm in stages, based on the classic research model of Masters and Johnson.
Level 1 — Threshold of Arousal Blood flow to the pelvic area increases, the vagina naturally dilates, and muscle tension gradually increases. At this stage, sensations are still superficial and easily interrupted — distraction or stress easily interrupts the process.
Stage 2 — Plateau The body reaches a “pre-orgasmic” level — heart rate and breathing quicken, the outer third of the vagina tightens, the clitoris becomes too sensitive to touch, often directly. This stage can last a long time — and this is where the “loss” or “recovery” most often occurs.
Level 3 — Climax and Release Rhythmic contractions of the pelvic floor muscles at 0.8 second intervals, a wave-like spread of sensation throughout the body. For some, this is a single peak, for others, a series of multiple waves if the stimulation continues.
Why you need to know this Understanding these stages helps partners be patient — gaining knowledge of what stage a partner is in often makes the process itself easier.