# Introduction The Humors are the study of flesh and bone, understanding both animal bodies and folk bodies (that is to say, bodies of creatures that are classified as [[Entities|Folk]]). This study is often linked to medicine, poison, surgery, disease, diet, sleep, and all matter of physiological needs. This is the study of [[Cathexis]] --- The Four Humors are the underlying principle that direct the care in living beings. The Four Humors are: Melancholy (Black), Choleric (Yellow), Sanguine (Red/Blood), Placidity (Celadon) “Too much sorrow in your blood” - Trauma Bodies bleed again when the person who murdered them is near. Lacnuga is a key book in the field of Humors.