That was my initial thought, and there is the additional factor that it is unhealthy to eat apple seeds, but then I realized that the core piece was probably there only for presentation.I don't think the piece with the stick in it, apple core, and seeds will be appetizing...
from the article:
The people who ate his genitalia were a 30-year-old couple, a 22-year-old women, a 32-year-old man and Shigenobu Matsuzawa, 29, an event planner.