A case is presented of a 49-year-old man who amputated his penis following instructions that he had obtained from the Internet. The patient had a long-standing amputee fetish, which evolved into eroticized genital mutilation. The transformation of the preferred fetish occurred in a setting of depression due to environmental stressors. The literature about amputee fetishism, also called "apotemnophilia," is reviewed, and possible connections with the genital mutilation are discussed.