Bundling, or tarrying, was the traditional practice of wrapping one person in a bed accompanied by another, usually as a part of courting behavior. The tradition is thought to have originated either in the Netherlands or in the British Isles and later became common in Colonial America, especially in Pennsylvania Dutch Country. When used for courtship, the aim was to allow intimacy without sexual intercourse.
Courtship practice 
Traditionally, participants were adolescents, with a boy staying at the residence of a girl. They were given separate blankets by the girl's parents and expected to talk to one another through the night. The practice was limited to the winter and sometimes the use of a bundling board, placed between the boy and girl, ensured that no sexual conduct would take place.
By word of mouth from Victorian times: In Buckinghamshire (England) it is understood the practice involved each of the young people being put into a sack, or bag, which was tied closed at their neck. They were then allowed to sleep together, each in their own sack. They could cuddle one another, but that was as far as they could go. The practice was not limited to the time of the year and was not uncommon during the 19th century. No doubt this was also practiced in other counties in England.
In the United States 
The practice of bundling continued in the early United States, where in the case of a scarcity of beds, travelers were occasionally permitted to bundle with locals. This seemingly strange practice allowed extra money to be made by renting out half a bed. Hotels rented rooms for the night, shared by many occupants, and sharing a bed entailed an additional fee.
As late as the mid-19th century, there are indications that bundling was still practiced in New England, although its popularity was waning. The court case of Graham v. Smith, 1 Edm.Sel.Cas. 267 (N.Y. 1846), initially argued before Judge Edmunds in the Orange Circuit Court of New York, concerned the seduction of a 19-year-old woman. Testimony in the case established that bundling was a common practice in certain rural social circles at the time. By the 20th century, bundling as a practice seemed to have died out almost everywhere, with only isolated references to it occurring in Amish Pennsylvania.
See also 
- Shachtman, Tom. Rumspringa: To Be or Not to Be Amish. New York: North Point Press (Farrar, Straus and Giroux), 2006.
- Ekrich, Roger A. At Day's Close: Night in Times Past. Chapter 7, 2005.
- Walsh, William S.: Handy Book of Curious Information. J. B. Lippincott Company, 1913
- Excerpts from Night Life of the Pennsylvania Dutch
- Folk Lore of the Pennsylvania Germans
- The Art of Bundling: Being an Inquiry into the Nature and Origins of that Curious but Universal Folk-Custom, with an Exposition of the Rise & Fall of Bundling in the Eastern Part of North America. By Dana Doten, 1938
- "Bundling" in the Global Anabaptist Mennonite Encyclopedia Online
- The original bundlers: Boaz and Ruth, and seventeenth-century English courtship practices - Critical Essay - Journal of Social History, Spring, 2002, by Yochi Fischer-Yinon