It does, but we don't need to treat with superstition, especially if we understand it is proposing doctrine to promote the Catholic brand rather than a universal truth, or even a human truth. Most every pope at least states some kind of infallibility because they don't conciously publish error (I say publish because there is a lot of ghost writing involved. Are ghosts infallible?). Some of that teaching office is an attempt at common sense advice, like Casti and Humanae Vitae. Most married people look at this attempt, which like the book of Proverbs is both didactic and a bit unreal, and laugh because they don't want to cry.