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 hoo...