You want answer here it goes, u need answer for smegma as a carcinogen.You need to provide sources for what u speak, u asked me I am providing coz medicine is practised as evidence based now adays.As far is smegma question goes here I am sending you the latest up todate in medicine as of 06-06-2006.I am also sending you the studies that were done Smegma — Smegma begins to form in the first few days of life as the result of desquamation of epithelial cells in the preputial sac; secretions from preputial glands also contribute. Smegma is carcinogenic, although the specific component of smegma responsible for malignant transformation in men is unclear. Mycobacterium smegmatis, a bacterium present in the preputial sac of about one-half of uncircumcised men, may convert sterols in smegma into carcinogenic compounds [32,33]. In uncircumcised men, the retention of smegma, particularly in the presence of phimosis, may promote malignant transformation by direct contact with chronically irritated epithelium . 1)Shabad, AL. Some aspects of etiology and prevention of penile cancer. J Urol 1964; 92:696. 2) Sobel, H, Plaut, A. The assimilation of cholesterol by Mycobacterium smegmatis. J Bacteriol 1949; 57:377. 3) Melicow, MM, Ganem, EJ. Cancerous and precancerous lesions of the penis: a clinical and pathological study based on 23 cases. J Urol 1996; 55:486.