Lumen Gentium is a dogmatic constitution because it refers to dogmas already defined in the past, but is NOT a NEW dogma.  *Apostolic Constitutions* are used to define NEW dogmas.  The last one was Munificentissimus Deus, the dogmatic definition of the Assumption (Pius XII, 1 November 1950).  Vatican II specifically refrained from defining any NEW dogmas.  The *truth content* of doctrines cannot change, but doctrines can develop to clarify ambiguities.  You can drive a truck through the ambiguities in CCC 1577, CCC 1598, and Ordinatio Sacerdotalis.  About St John Paul II and his decision to declare a hiatus on further official discussion of this issue, would this be the first time that a pope speaks with both sides of his mouth, for the good of the Church?  I believe in my heart that there is a PONY under all the theological stuff in the Theology of the Body, and the pony SMELLS GOOD.  The pony is the HOMOGENEOUS SACRAMENTALITY of the human body, male and female.  SAME FLESH!  Prayers!