hit the head的意思为什么是上厕所？

因为，去厕所的时候会撞到门框~就hit the head 了

The washroom in a boat is called "head", while the head of a boat is called "bow". Hence, if you want to go to the washroom, you should say "hit the head".

There's no delicate way to put this – if someone says they are going to hit the head, it means they plan on using the restroom. The expression hit the head comes from Navy and Coast Guard jargon for 'bathroom'. Sailors, marines and Coast Guard members call their facilities heads, while land-based military personnel call them latrines. Naval ships actually have the word head stenciled on the watertight doors leading to the cramped but serviceable facilities.

The origin of hit the head can be traced back to ancient sailing vessels. Sailors who needed to relieve themselves would make their way to a designated area under the deck near the bow or front of the ship. This area was selected for several reasons. First of all, the odors would be