Well, who says that they were chaste and modest, the ladies and damsels of yesteryear? And even the knights themselves. They knew exactly why they had the chastity belt fastened to their ladies' pretty bodies when they themselves went on crusade or had other important official business to attend to. Better safe than sorry - that's what the robber baron Archibald meant in our case, or in this cheerful film case, when he was summoned to help by his bosom friend Sigurd and went to war with his proud host.