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In a recent article, Cerny and Janssen (2011) reported the results ofanempiricalstudycomparingsexualarousalpatternsofbisexual men with those of homosexual and heterosexual men. They concluded:‘‘… bisexuality in men is associated with a unique and specific pattern of sexual arousal.’’This conclusion contrasted with that of Rieger, Chivers, and Bailey (2005), who conducted a similar study with a larger sample and failed to find evidence that their bisexual sample had an arousal pattern that was unique, specificorbisexual. Rather, Riegeretal. foundthatbisexualmenwerenomorelikelytoexhibitapatternofbisexualgenital arousal than were heterosexual or homosexual men, and that few men in any group had a genital arousal pattern that was plausiblybisexual (ie, showingsubstantialarousaltobothmale and female stimuli).

Cerny and Janssen (2011) supported their conclusion—that bisexual men have a unique …