It would be interesting to see the brain activity taking place through a functional MRI in addition to a tumescence monitor. Recent investigation of female arousal using fMRI analysis has allowed researchers to more objectively establish physiological arousal mechanisms. And on a related note, I would be interested in knowing what percentage of men who identify themselves as bisexual have had a history of sexual abuse. It is my guess that is (proportionally) higher than those who identify exclusively as heterosexual or homosexual.
Concerning the argument above, I don't think anyone has claimed true bisexuality in men is nonexistent. Research just seems to be showing that it is far less common among males. I wouldn't call the evidence conclusive by any means, but it's nothing to get upset about. "Lying" is probably not the write word, though.
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