text: Some men "who took a vow" raped little children.  Then celebrated mass.  And kept on celebrating masses for years.  And raping children.  The pontifical secret means that anyone in the church reporting "men who took a vow" to the civil authorities for this crime, i.e. Police, are to be excommunicated. This still stands today, and Francis could wipe it out with a stroke of his pen today.  But he has not.  Look up 'Pontifical Secret'.
  
  Further, why should a man not take more than one vow?  What is wrong with the married state?  What is wrong with sex in a committed relationship? What is sinful enough to suggest death of the soul?  Forever.  The priestly vow of celibacy is only a church discipline.  Like not eating meat on a Friday.  That discipline has been abolished, so why not the celibacy one?   God/Jesus never suggested  that "mortal sin" exists.  It is a construct by the church, made to instill fear into its subjects so as to have power over them.