This was my immediate thought too. Sort of a cross between “dropping breadcrumbs” (to leave a visible trail to follow) and “pearls before swine” (which the swine don’t care about anyway).
I didn’t immediately think about sexuality as the matter being hinted to, as others have suggested, but I agree it does make some sense. Or perhaps the Biblical reference is important, in which case it could be about embracing/abandoning religious faith.
ETA: 52