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A bathroom is a room in the home for personal hygiene activities, generally containing a sink (basin) and either a bathtub, a shower, or both. In some countries, the toilet is included in this room, for ease of plumbing, whereas other cultures consider this insanitary, and give that fixture a room of its own.
Historically, bathing was often a collective activity, which took place in public baths. In some countries the shared social aspect of cleansing the body is still important, as for example with sento in Japan and saunas in Finland.
In North American English the word "bathroom" may be used to mean any room containing a toilet, even a public toilet (although in the United States this is more commonly called a restroom and in Canada a washroom).