For the longest time, spontaneous human orgasm — like spontaneous human combustion — was an unlikely subject of formal scientific research. All that is changing, reports veteran science writer William J. Broad in Sunday's New York Times. He lightly surveys the past century of study into hands-free autoerotism, including this gem from turn of the (last) century British physician Havelock Ellis, who said that concentrating on sexual images, among other stimuli, could lead to “spontaneous orgasm in either sex, even in perfectly normal persons.”
Imagine that!