How many movies have Edward Yen and Roger Schmalberg collaborated on?

They have worked on 21 movies together! Their first movie together was Forbidden Sex of the Kama Sutra (1996) while their highest rated movie together was Goya and the Naked Maja (1997). They have not worked together since Selen, The Girl of the Treasure Island (1998). They are most known for their drama films together.