Because on the old sailing ships the wind blew from the back to the front. Sailors would go to the front of the ship, where the figurehead is, to do their business over the side, so that it and the smell were blown away from the rest of the ship. You would tell your mates you were going to the head and they all knew what you meant. The name has stuck ever since.
"The head".
Pirates commonly referred to the toilet as the "head." This term originates from the location of the toilet on a ship, which was typically at the front, or "head," of the vessel. Using nautical terminology, they would say they were "going to the head" when they needed to relieve themselves.
The head is naval slang for the toilet. "Head" can also be a sexual reference (to oral sex).
Like all Naval vessels, the term used for a Submarine's bathroom is a "Head".The term "Head", in reference to a ship's toilet, was used at least as far back as 1708 on sailing vessels. It referred to the location of the ship's toilet, then located at the bow, or head, of the ship, under the bowsprit. It was located there as it was naturally washed by the ocean spray coming over the bow. The nautical term head, referring to the front or bow of a vessel, dates back to the early 1400's.
The term "head" to refer to a ship's toilet and that is a good place to do it.
'Bog' is a slang term sometimes used in Britain for a toilet.
The term "head" for restroom originates from nautical terminology. On ships, the restroom was often located at the bow (front) of the vessel, where it was referred to as the "head" due to its position and the use of a toilet that was typically a simple hole in the deck. This term has persisted and is still used in maritime contexts today.
The toilet on a boat is referred to as the "head".
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A toilet in the U.S. Marines or U.S. Navy is traditionally known as a 'head', so someone who needs to go to the bathroom is "making a head call." The Army and Air Force makes do with the Boy Scout term "latrine."
Rag head is a rascists term used against Muslims, and arabs.
School prank- Putting someones head in a toilet, then flushing.