470.  VII.  THE JUST CAUSES OF THIS CONCUBINAGE ARE THE JUST CAUSES OF SEPARATION FROM THE BED. There are legitimate causes of separation, and there are just causes:  legitimate causes are enforced by the decisions of judges, and just causes by the decisions come to by the man alone.  The causes both legitimate and just of separation from the bed, and also from the house, were briefly enumerated above, n. 252, 253; among which are VITIATED STATES OF THE BODY, including diseases whereby the whole body is so far infected, that the contagion may prove fatal:  of this nature are malignant and pestilential fevers, leprosies, the venereal disease, cancers; also diseases whereby the whole body is so far weighed down, as to admit of no sociability, and from which exhale dangerous effluvia and noxious vapors, whether from the surface of the body, or from its inward parts, in particular from the stomach and the lungs:  from the surface of the body proceed malignant pocks, warts, pustules, scorbutic pthisis, virulent scab, especially if the face is disfigured by it; from the stomach proceed foul, stinking, and rank eructations; from the lungs, filthy and putrid exhalations arising from imposthumes, ulcers or abscesses, or from vitiated blood or serum.  Besides these there are also other various diseases; as lipothamia, which is a total faintness of body, and defect of strength; paralysis, which is a loosening and relaxation of the membranes and ligaments which serve for motion; epilepsy; permanent infirmity arising from apoplexy; certain chronical diseases; the iliac passion; rupture; besides other diseases, which the science of pathology teaches.  VITIATED STATES OF THE MIND, which are just causes of separation from the bed and the house, are madness, frenzy, furious wildness, actual foolishness and idiocy, loss of memory, and the like.  That these are just causes of concubinage, since they are just causes of separation, reason sees without the help of a judge.

471.  VIII.  OF THE EXCUSATORY CAUSES OF THIS CONCUBINAGE SOME ARE REAL AND SOME ARE NOT.  Since besides the just causes which are just causes of separation, and thence become just causes of concubinage, there are also excusatory causes, which depend on judgement and justice with the man, therefore these also are to be mentioned:  but as the judgements of justice may be perverted and be converted by confirmations into the appearances of what is just, therefore these excusatory causes are distinguished into real and not real, and are separately described.

472.  IX.  THE REALLY EXCUSATORY CAUSES ARE SUCH AS ARE GROUNDED IN WHAT IS JUST. To know these causes, it may be sufficient to mention some of them; such as having no natural affection towards the children, and a consequent rejection of them, intemperance, drunkenness, uncleanliness, immodesty, a desire of divulging family secrets, of disputing, of striking, of taking revenge, of doing evil, of stealing, of deceiving; internal dissimilitude, whence comes antipathy; a froward requirement of the conjugial debt, whence the man becomes as cold as a stone; being addicted to magic and witchcraft; an extreme degree of impiety; and other similar evils.