As for “Men are always ready for sex,” why should any psychologist find it startling that adolescent boys agree with that? There is massive evidence—anthropological, psychological, even endocrinological, abundantly corroborated by everyday experience—that males are, on the whole, primed for sex and more ready to casually engage in it than females are. And this begins in adolescence. One well-known experiment compared male and female college students’ responses to invitations to have casual sex from an attractive stranger of the opposite sex. Seventy percent of males said, “Okay, let’s do it,” and almost all seemed comfortable with the request. Of the females, 100 percent said, “No,” and a majority felt insulted by the proposal.16

-The War Against Boys Christina Hoff Sommers (p. 147)