ABSTRACT
Sexual interaction is a motivated behavior that, like other goal-directed behaviors, is manifested through a complex sequence of fine and coarse motor patterns. In male sexual behavior in particular, the fine motor components include penile responses and the contraction of various organs associated with erection, penile insertion, seminal emission, and ejaculation. The coarse motor components involve the contraction and relaxation of the muscles responsible for the stereotypic copulatory movements of mount (M), intromission (I), and ejaculation (E).
