Sexual beliefs underlying male sexual dysfunction are known to emphasize excessively high sexual performance, among other inaccuracies. The purpose of this study was to determine the frequency of certain sexual beliefs among Turkish men with and without erectile dysfunction. In this comparative-descriptive study, demographic data and participant views regarding 50 common sexual beliefs were collected with a questionnaire. The study was conducted at the urology clinic of a university hospital in Turkey between May 2011 and August 2013. Participants were 815 men: 304 with erectile dysfunction and 511 without. Men with erectile dysfunction endorsed 8 beliefs about sexual activity more frequently than did men without erectile dysfunction. Findings indicate the association of certain cognitions with erectile dysfunction. Most of these cognitions concerned high expectations of male sexual function.