Hi Steve…while I fully agree with your explanation, I would like to mention that: for a fresher, the basic blowing and drawing technique itself is fairly difficult and creating the appropriate throat shape is all the more difficult, thereby leading to frustration in getting holes two and three to sound correct. If the learner is made to use the nose partially, for blowing and drawing, specially hole numbers two and three, they will sound correct with little effort. Once underway, the student could be taught to create the appropriate throat shape. I have come across ‘senior’ players who are unable to blow and draw hole numbers two and three correctly and tend to choke them.