There's no accounting for tastes. Much less needs. A pregnant woman's hormonal changes are like a tsunami instead of a tide. Or the ebb. No one knows what the mom-to-be will need in the next second. The wife of the hero of this story, for example, needed sex. But here's the trouble, the hero was raised in strict rules, and he could only have sex to reproduce. She had to resort to the help of highly specialized experts.