One of the world's most prestigious health journals has lashed a fast-growing trend in the United States and Britain for "designer vaginas," the tabloid term for cosmetic surgery to the female genitalia. The fashion is being driven by commercial and media pressures that exploit women's insecurities and is fraught with unknowns, including a risk to sexual arousal, the British Medical Journal (BMJ) says. Known as elective genitoplasty, the surgery usually entails shortening or changing the shape of the outer lips, or labia, but may also include reduction in the hood of skin covering the clitoris or shortening the vagina itself....