Guigemar’s ship is clearly magical, propelled by some supernatural force to an undetermined destination. Though he’s also in a weakened state, Guigemar seems to accept the ship’s journey as normal within the parameters of his world. Old husbands and young wives were a common trope in medieval literature, and a comic one, as cuckoldry (a man being shamed by his wife’s adultery) was often regarded as a satiric element in such literature. Here, in a trope that will be repeated in other stories in the
Lais, the elderly lord basically expects his wife to cheat on him. Marie’s comment is sardonic—what men, old or not,
wouldn’t “hate to be cuckolded”?—but it also anticipates the possibility that this very thing will occur.