The purpose of this study is to detect the prevalence of sexual dysfunction and also to investigate possible risk factors that may cause sexual dysfunction in Turkish men. We developed a Web-based survey. In total, 3185 invitations to complete the survey were e-mailed and 2288 individuals submitted responses (72%). The men were interviewed in person, using the Florida Sexual History Questionnaire (FSHQ) Turkish version, and sexual dysfunction was assessed by this questionnaire. male sexual dysfunction (MSD) was evaluated with FSHQ. According to the FSHQ Turkish version, sexual function domains included sexual desire, sexual development, intercourse, erection, ejaculation, and satisfaction. According to the FSHQ score, 43.3% reported on MSD (FSHQ score