Writing Prompt: Body Parts are Body Parts

Have you ever read those tabloid stories about people getting intoxicated in far away lands and waking up without various organs?  There is something about body parts being assembled and given life that makes for creepy horror stories.  In the original Frankenstein movie, the brain of a felon (a serial killer I think) is accidentally used by Dr. Frankenstein when he is creating his monster.  The story could have been vastly different with a different brain.  The original Star Trek also used a brain transplant as a plot device when Spock's brain was stolen in order to run an alien outpost deep beneath the surface of a planet.

For today's writing prompt, devise a short story that is centered around the transplantation of --

a brain!