OK Ottaviani. Paul was trying to protect papal authority, reinforcing Casti (which said unfortunate things about the papacy having a special position on natural law reason, which is contrary to the spirit of reason entirely). In doing so, he damaged the reputation of the Church that ignored the outlandish reason of Pius because, sadly for Paul, everyone was watching. Sex for pleasure alone is not heresy, it is a violation of the philosophical norms of the Asexual Mafia in the Church. Salvation is a state of being for the living, not just our ultimate end when we are dead. It is being at peace with Christ now, not worrying constantly about one's sexual sins.