Sexual arousal
Category-specificity refers to a person showing sexual arousal to the categories of people they prefer to have sex with. Sexual arousal studies involving category-specificity look at genital responses (physiological changes), as well as subjective responses (what people report their arousal levels to be). Category-specific sexual arousal is more commonly found amongst men than women. Heterosexual men experience much higher genital and subjective arousal to women than to men. This pattern is reversed for homosexual men.