Male offenders against boys seem to be quite different from male offenders against girls. Nonetheless, it is unlikely that homosexual pedophiles have much in common with other homosexuals, that is, adult men who are sexually attracted to other adult men. For one, a good percentage of homosexual pedophiles also molest girls, over 60 percent in one study. Secondly, in an important 1988 study by William Marshall and colleagues, about two-thirds of sexual offenders against boys showed greater sexual 4 arousal to pictures of adult women than they did to pictures of adult men.