Phase 1: Excitement.
As you get excited, your heart beats faster and your breathing gets heavier. Your skin may redden. More blood flows to your genitals. The clitoris swells and the male organ gets erect. Nipples harden and the female organ may get wet. Muscles throughout your body tense up, boosting coital tension.
Phase 2: Plateau.
The changes in your body intensify. Breathing, heartbeat, and blood pressure rise. Muscle tension increases even more. The female organ swells and its walls turn a darker color. The clitoris becomes super-sensitive to touch. The testicles pull upward.
Phase 3: Orgasm
When excitement reaches its peak. You feel a series of intense muscle contractions as your body releases the tension. The muscles of the vagina and the uterus contract. Muscles at the base of the penis tighten and release, releasing semen in an ejaculation.
Phase 4: Resolution.
Now spent of your pent-up energy, your body returns to its pre-s*x state. Your breathing calms. Muscles relax. The male and female organs return to their original size and color. You may feel calm, satisfied, or tired out.
This four-phase cycle is a fairly simple way to describe the human coital response. In reality, human bodies (and minds) are unique. The way we respond to coitus doesn't always fit neatly into four ordered boxes.
