To me, the blues is an infection. I don't think it's necessarily a melancholy thing; the blues can be really positive and I think I think anyone and everyone can have a place for the blues. It need not always a woeful, sorrowful thing. It's more reflective; it reminds you to feel.
Using no control and using humor will build a relationship and make a dent to where the client puts the counselor in their quality world and then begins to relate and seek out the counselor. Effective therapy begins with the acceptance of the therapist into the client's quality world.
Don't confuse hypothesis and theory. The former is a possible explanation; the latter, the correct one. The establishment of theory is the very purpose of science.