I was just thinking the same thing: it sounds like he NEEDS this obsession - possibly avoiding something else that is really bothering or worrying him? It's easier to channel all the energies on this topic so that you don't need to address what's really bothering you. I remember that practice all too well.
Seymour, if taking tranquilizers for a few days helps improve your physical symptoms, isn't that proof that this is not a physical condition causing this?
Sue