[marshmallow]

There is only one body of Church teaching. It's either Catholic teaching or it isn't. Ex cathedra simply means "from the chair". It denotes the magisterium of the Church.

[Luircin]

So you’re telling me that church run brothels and selling indulgences is all hunky dory because church teaching used to approve of those.

[Elsie]

It denotes the magisterium of the Church.

Then just WHY does Rome need a pope?