What is bunk bed in minecraft?

In Minecraft, a bunk bed is a type of furniture that allows two players or mobs to sleep in a single block space. It is made by stacking two beds on top of each other. Bunk beds can save space in small houses and are popular in multiplayer servers. They can be crafted using six wooden planks and two beds, which can be of any color. Bunk beds also allow players to set their spawn point if they sleep in them. They are often used in kid's bedrooms or themed building projects, such as military barracks or hostels.