How many movies have Gianni Ferrio and Lino Banfi collaborated on?

They have worked on 10 movies together! Their first movie together was Io non spezzo... rompo (1971) while their highest rated movie together was The Honorable with His Lover under the Bed (1981). They have not worked together since Dio li fa poi li accoppia (1982). They are most known for their comedy films together.