A chemise cagoule was a heavy night shirt worn by Catholic men and women during the Middle Ages in order to permit a husband to impregnate his wife without having to endure any unnecessary physical contact with her.[1] The chemise cagoule covered all sexual areas, but left an opening for necessary contact.[2] Pious couples were expected to use chemise cagoules at every lovemaking session, and thus would never see each other naked.[3]
A similar concept was employed in Native American cultures as the "chastity blanket", an item of similar design held by tribal elders until requested for use by a man.[4]