Make circumcision reduces female pleasure. The foreskin is double-layered. During intercourse, the moist and pliant foreskin rolls past itself massaging the vagina and exciting it more than the 'dry stick' of a circumcised penis. The foreskin keeps the glans moist and soft aiding in foreplay, insertion, and intercourse. Dry or painful sex is the number one sexual complaint of women in the United States. "During intercourse, the skin of an intact penis slides up and down the shaft, stimulating the glans and the nerves of the inner and outer foreskin. On the outstroke, the glans is partially or completely engulfed by the foreskin with more skin remaining inside the vagina than is the case with the circumcised penis. This `valve' mechanism is thought to retain the natural lubrication provided by the female because the bunched up skin acts to block the lubrication escaping from the vagina, which results in dryness." About 70% of American men alive today are circumcised. About 60% of U.S. baby boys are circumcised each year. It is illegal to circumcise girls in the United States.