Columbia subject headings:
Catholic Church--Doctrines.
Love--Religious aspects--Christianity.
Sex--Religious aspects--Catholic Church.
Sexual ethics.
Harvard subject headings:
Catholic Church--Doctrines.
Love--Religious aspects--Christianity
Sex--Religious aspects--Catholic Church
Sexual ethics.
Princeton subject headings:
Catholic Church--Doctrines.
Love--Religious aspects--Catholic Church.
Sex--Religious aspects--Catholic Church.
Sexual ethics.