Lay a cloth napkin on a flat surface, “wrong” side facing up. Hold a dinner fork vertically, tines down (like you’re about to twirl spaghetti), on the center of the napkin. Slip a little of the fabric between the tines to stabilize it. Slowly turn the fork in either direction (the spaghetti-twirling motion) so that the napkin forms a spiral around the fork. Carefully remove the fork. Encircle the napkin with both hands to keep the rose from unwinding. Flip it over.