“…A variety of stimulus modalities have been used to evaluate the male sexual response, including fantasies (Marks and Gelder, 1967;Thorpe et al, 1964), movies (Herman et al, 1971;McConaghy, 1967McConaghy, , 1969, and slides or pictures (Davison, 1968;Feldman and MacCulloch, 1971;Thorpe et al, 1963). Abel et al (1975), however, found that videotapes generated the highest level of arousal, audiotapes the lowest, and slides an intermediate level of sexual arousal in male homosexuals presented with erotic and neutral stimuli.…”