Fifty Shades Of Them.

Phase 1 : Excitement.

The woman's breasts become fuller and the vaginal walls begin to swell.The man's testicles swell, his scrotum tightens, and he begins secreting a lubricating liquid.

Phase 2 : Plateau.

The woman's clitoris becomes highly sensitive (may even be painful to touch) and retracts under the clitoral hood to avoid direct stimulation from the penis.The man's testicles are withdrawn up into the scrotum.

Phase 3 : Orgasm.

In women, the muscles of the vagina contract. The uterus also undergoes rhythmic contractions.In men, rhythmic contractions of the muscles at the base of the penis result in the ejaculation of semen.A rash, or "sex flush" may appear over the entire body.

Phase 4 : Resolution

The body slowly returns to its normal level of functioning, and swelled and erect body parts return to their previous size and color.

Phase 5 : Sex.

"Come, sit here, on my chest." He pats his sternum. His silky voice is dripping with erotic promise.