The 6th commandment for Roman Catholicism, though not the OT, is thou shalt not commit adultery.
http://www.beginningcatholic.com/catholic-ten-commandments
I would be willing to bet that commandment is broken by the vast majority of Roman Catholics on any given day....with this being the beginning of the weekend I bet even that number increases.
Sir,
What can I say?
Your depth of knowledge of Catholic Theology is only eclipsed by your knowledge of the sexual habits of Catholics.