just sleep naked period
Why Do We Wear Clothes To Bed?
At one point in time we didn’t have modern conveniences like indoor heating so a lot people had to wear clothes to bed to keep themselves warm at night. Doing laundry required a bit more work, so people were cautious about keeping their bedding clean.
People also couldn’t sleep naked for religious reasons. The Knights of the Tenmplar were forbben to sleep naked to observe the religious rules of St. Augustine. In Islam, Muslims are required to cover their “awrah” or their imitate parts when they’re bathing or having sex.