New research appears to question whether a biological basis for male bisexuality exists, The New York Times reported Tuesday.

Psychologists in Chicago and Toronto studied the genital arousal patterns of men who called themselves bisexual, finding that most were "exclusively aroused by either one sex or the other, usually by other men," the newspaper reported.

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About 75 percent of 33 study participants who said they were bisexual had arousal patterns identical to those of gay men, while the rest were indistinguishable from heterosexuals, the Times said.

The study was small, however, and researchers who read it before its scheduled publication in the journal Psychological Science told the newspaper that it would have to be repeated with larger numbers of men who professed to be bisexual before clear conclusions could be reached.

"The last thing you want is for some therapists to see this study and start telling bisexual people that they're wrong, that they're really on their way to homosexuality," Dr Randall Sell, an assistant professor of clinical socio-medical sciences at Columbia University, told the newspaper. "We don't know nearly enough about sexual orientation and identity" to reach these conclusions, he added. – (HealthDayNews)
 

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