“Kertbeny coined 'heterosexual' and 'homosexual' as a pair on purpose: having two marked categories instead of only one generates a certain amount of equality, which was precisely his point. The paired words suggest that both 'homo' and 'hetero' are marked categories whose specialization sets them off from the unmarked human universal, the undifferentiated 'sexual'.” SexualityBisexualPansexual Book:Straight: The Surprisingly Short History Of Heterosexuality Source: Straight: The Surprisingly Short History Of Heterosexuality