Your imagery is rather perjorative, IMO. Certainly lots of married women, faithful to their husbands, use oral contraceptives.
No matter who she is, the woman who engages in sex (and the men who encourage it) with the demand that procreation will not happen is abusing her sexuality. Of course others disagree. But nature seems to back me up in this regard since so many people who "take precautions" end up pregnant. No one having sex has any right to think that pregnancy is impossible. We all know better. Shame on those who pretend otherwise - and then kill the babies that inconveniently result.
The leg raising example is really about the kids in high school and college who are encouraged to get their legs in the air as early as possible.