I have learned, as have most men who have been married 35+ years, that there's precious little point in trying to dissuade one's wife from a set course of action. In the end it's going to be done her way regardless, so you might as well just not put up any resistance.
"Ours in not to reason why..."
Soon-ok's latest instructions for improving the patio, gleaned from some helpful household hints website, require the sprinkling of coffee grounds around the base of the roses.
The roses show no sign of improvement but we have the most wide awake spiders in the neighborhood.