TYPES OF SEX CRIMES ARE EXAMINED (I.E., FRINGE SEX, SUBSTITUTE OBJECTS, SUBSTITUTE ACTS), IN ADDITION TO ASPECTS AFFECTING INVESTIGATION AND CONTROL OF THESE CRIMES. THE TYPES OF FRINGE SEX EXAMINED INCLUDE FROTTAGE, MUTUAL MASTURBATION, SODOMY, VOYEURISM, EXHIBITIONISM, AND GROUP SEX, WHILE CERTAIN OTHER FORMS OF DEVIANCE ARE CHARACTERIZED AS SUBSTITUTE SEX, WHERE THE 'NORMALLY ACCEPTABLE' PARTNER IS REPLACED, USUALLY BY FORCE, WITH SOME OTHER 'SEX OBJECT.' THESE CASES MAY INVOLVE RAPE, CHILD MOLESTING, GERONTOPHILIA, INCEST, BESTIALITY, NECROPHILIA, AND FETISHISM. SUBSTITUTE SEX ACTS--BOTH AGGRESSIVE AND PASSIVE--OFTEN INCLUDE SADISM AND MASOCHISM, VAMPIRISM, CANNIBALISM, OBSCENE PHONE CALLS, KLEPTOMANIA, AND PYROMANIA. HOMOSEXUALS AND TRANSVESTITES ARE ALSO DISCUSSED, BOTH IN TERMS OF THE PROBLEMS THEY PRESENT IN REGARDS TO THE LEGALITY OR ILLEGALITY OF THEIR BEHAVIOR AND THE PROBLEMS SUCH BEHAVIOR, PARTICULARLY HOMOSEXUALITY, CAN CAUSE, INCLUDING MUGGINGS, BLACKMAIL, AND PROSTITUTION INVOLVING YOUNG BOYS. FINALLY PROBLEMS LAW ENFORCEMENT OFFICERS HAVE ENCOUNTERED DURING THE INVESTIGATION OF SEX CRIMES ARE HIGHLIGHTED--PUBLIC PRESSURE TO ELIMINATE PROSTITUTION AND PORNOGRAPHY, DIFFICULTIES IN IDENTIFYING ATTACKERS AND WITNESSES AND OBTAINING OTHER EVIDENCE, AND THE PARTICULRLY SENSITIVE PROBLEMS CONCERNING THE RIGHTS OF SUSPECTED SEX OFFENDERS. (KBL)