“…In this way, an animal's sexual arousal, desire, and partner preferences are primed by the presence of cues associated previously with sexual reward, and sexual behaviors that generate the reward state become sensitized across an acquisition period. Ejaculation in men, for example, is typically associated with orgasm (Kinsey, Pomeroy, & Martin, 1948), although ejaculation can occur with a diminished or absent orgasm, for example, in some instances of premature or rapid ejaculation (Sotomayor, 2005), and orgasm can occur without ejaculation (Roehrborn, Kaplan, Lepor, & Volinn, 2011). In most male rats, ejaculations, but not penile intromissions, are necessary for the development of a CPP.…”