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Erectile dysfunction (ED) is one of the most common sexual health diagnoses in men. Previous studies demonstrated that ED can be even more prevalent among sexual minority men. This study investigated whether sexual identity is related to erectile function (EF) and explored variables possibly contributing to the differences between Polish straight and sexual minority men. The study sample included 1,246 gay, 838 straight, and 535 bisexual men who participated in an online survey. First, the psychometric qualities of the IIEF-2-EF scale used in the study were examined through confirmatory and exploratory factor analysis; a correction to account for potential bias in the questionnaire was also applied. Next, a series of univariate and multivariable models accounting for predictors possibly contributing to the observed differences between the groups of men were conducted. It was demonstrated that gay and …