Conceptualization of the sexual response models in men: are there differences between sexually functional and dysfunctional men?

Introduction: Research to validate models of sexual response empirically in men with and without sexual dysfunction (MSD), as currently defined, is limited.Aim: To explore the extent to which the traditional linear or the Basson circular model best represents male sexual response for men with MSD and sexually functional men.Methods: In total, 573 men completed an online questionnaire to assess sexual function and aspects of the models of sexual response. In total, 42.2% of men (242) were sexually functional, and 57.8% (331) had at least one MSD. Models were built and tested using bootstrapping and structural equation modeling.Main Outcome Measures: Fit of models for men with and without MSD.Results: The linear model and the initial circular model were a poor fit for men with and without MSD. A modified version of the circular model demonstrated adequate fit for the two groups and showed important interactions between psychological factors and sexual response for men with and without MSD.Conclusion: Male sexual response was not represented by the linear model for men with or without MSD, excluding possible healthy responsive desire. The circular model provided a better fit for the two groups of men but demonstrated that the relations between psychological factors and phases of sexual response were different for men with and without MSD as currently defined.