A qualitative analysis of interview data with 41 rapists determined that 5 implicit theories (ITs) underlie rapists' offense supportive beliefs/feelings/motives: (a) dangerous world (DW)where men have feelings of generalized anger and/or resentment toward others; (b) women are dangerouswhere men hold a set of attitudes that are hostile toward women; (c) women as sexual objects (WSO)where women are seen as primarily sexual objects; (d) male sex drive is uncontrollablewhere sexual urges are seen all consuming; (e) entitlementwhere men feel that they can do exactly what they want. Consideration of whether DW or WSO ITs were present or absent indicated that three main groups could be identified: Group 1: violently motivatedpresence of DW and/or absence of WSO; Group 2: sexually motivatedpresence of WSO and/or absence of DW; Group 3: sadistically motivatedpresence of DW and WSO. These results are discussed in terms of treatment needs of rapists. (Published Abstract)