"[I]n women, the same areas that tend to become active when viewing sexual imagery that neuroscientists have deemed pleasing also became active in response to photos of vomiting or feces."

"What scientists tend to regard as 'arousal' on brain scans could also be its opposite, or perhaps some combination of each."

From "What Can Brain Scans Tell Us About Sex?" (NYT)(noting a study that reported that "what happens in the brains of female study subjects when they look at sexual imagery is pretty much the same as what happens in the brains of their male counterparts").