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I'm all for a national policy of highlighting that sex should be pleasurable for women. Sounds like a fantastic idea, every country should do this. Men who disagree are complete idiots (presumably they've never brought a woman to orgasm, so they don't know the difference).
But in the constitution? I mean, next to "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press..." (or whatever the Equadorian version is)? Make it a federal law or part of the school curriculum or something, but save the constitution for, you know, the form of government and the inherent rights of a free society and stuff like that (and yes, I know female sexual pleasure could be said to be a inherent right, but it's awfully specific to be enumerated, don't you think?) Maybe a more general "Everyone has a right to make decisions about their own body"-clause, that ensures includes the right to abortion, having consensual sex with anyone you want, etc. etc.