Original sentence: According to the Centers for Disease Control (CDC) from 1994 to 1997 the proportion of homosexual men stating they had anal sex increased from 57.6 percent to 61.2 percent.Anal sex can be an important risk factor for intestinal parasitism.As of 1998, fifty-four percent of all AIDS cases in the United States were homosexual men, and the CDC stated that nearly ninety percent of these men acquired HIV through sexual activity with other men.Originally the syndrome was called the "gay disease" because the overwhelming majority of patients were homosexual men.Some studies report that anal sex may be an important risk factor for the relay of many diseases.The original spread of AIDS is generally attributed to homosexual promiscuity of men