pipelining
Used for when a character is attached to pipes or tubes, and forced to take fluids, fecal matter, or other substances like they were part of a pipeline. This is commonly seen in scenarios where characters are being used as toilets. In such a case toilet_slave will also apply.
In some cases, the pipeline will enter one orifice and exit another orifice. For such a case, also include the complete_pipeline tag.
If the pipelining forms a closed loop by exiting one orifice and entering another orifice, it is called circulation. It has to form a looped system to qualify for this tag.