Attorney Craig Andresen has a good post on the subject:
but in Kentucky there is a little known law, KRS 404.040, that has been on the books for a very long time, that says that a husband is reponsible for “necessaries” furnished to his wife after marriage.  This old Kentucky case, Ketterer v. Nelson, 146 Ky. 7, 141 S.W. 409 , has interpreted this law to define “necessaries’ as medical and burial expenses.  I am not aware of any medical creditors forcing this issue through litigation recently, but it is fairly routine in this area of Kentucky for medical creditors to file suit against husbands for medical debt of the wife, invoking this statute.  Maybe it is time that this archaic, sexist law be “taken off the books” .