Abstract: A bed sheet assembly includes a fitted sheet and a top sheet. The fitted sheet is configured to at least partially envelope a mattress. The fitted sheet includes a top portion, a side portion, and a bottom portion. The top sheet includes an upper top sheet end, a lower top sheet end opposite the upper top sheet end, and a first top sheet side and a second top sheet side opposite the first top sheet side. The top sheet is attached to the top portion of the fitted sheet by a joint. The joint includes a longitudinal segment extending in a longitudinal direction between the upper top sheet end and the lower top sheet end. The joint further includes a lateral segment extending in a lateral direction between the first top sheet side and the second top sheet side.