I have yet to see the Pope make any infallible (ex-cathedra) statement on anything in my lifetime (that would be because the last time a statement was made was in 1950).The RCC is the Pope, you can be as based as you like but the Pope has the last say on your baseness. He can declare a new obligatory sacrament of anal dildoing for every catholic and you'd have no recourse against the guy according to RCC dogma. You have no say in the matter and you have to follow or face excommunication.