"Like Bailey, women who consent to the risk of pregnancy do so within a complex field of pressures and constraints. Most obviously, both women and men feel a powerful need for sex. Lifelong abstinence is an option, of course, but it is not clear that it is any more reasonable an option than Bailey’s option of remaining permanently unemployed Religious ascetics do without sex, but they also often do without food; doubtless Bailey would have been better able to resist the blandishments of the Riverside Company if he had been willing to follow the ascetics’ example. Again, if the thirteenth amendment means anything, it means that a person should not have to choose between submitting to servitude or denying a need that almost all human beings find irresistible."