The clean bed linen theory
If you haven’t yet noticed, the colonial era wasn’t as peachy as the movies paint them out to be. In fact, you’d better brace yourself because the stories only get weirder as we go along. During the 1600’s, the Puritans believed that the neatness of their bed linens directly reflected their body’s cleanliness.
The majority of people considered going to bed with clothing to be unhygienic and immoral. Sleeping in the nude was the only way to have “clean” bedsheets.