How many movies have Nico Wolferstetter and Walter Boos collaborated on?

They have worked on 5 movies together! Their first movie together was The Swinging Co-eds (1972) while their highest rated movie together was Schoolgirl Report Part 13: Don't Forget Love During Sex (1980). They have not worked together since Schoolgirl Report Part 13: Don't Forget Love During Sex (1980). They are most known for their comedy films together.