Hayley wandered home, her mind full of contradictions. Biology was telling her that she was young, fit and fertile, and that this was the time to mate – she didn’t realize the cause, but she was filled with the powerful urge. Economics was telling her that she was still a dependent, a child who was years from being able to lead an independent life – pregnancy would be a disaster. Her peer group was beginning to drop heavy hints that things were progressing between them and their boys – several girls had admitted to having