I frequently hear physician's voice the following argument with respect to sexual disorders and anxiety/depression, and I wonder of its validity: If there's a chemical treatment (e.g. pharmaceuticals) and it's successful, then the problem is physiological, not psychological. The argument appears invalid to me, because it seems to assume too large of a rift between one's psychology and one's brain. More exactly, if a chemical treatment works, and if one's psychology (i.e. thought-patterns and emotions) can have an effect on one's brain chemistry (and vice versa), then couldn't the problem still have a psychological source? It seems as if these physicians view psychology as having a basis in a something (a soul perhaps) that is causally independent of the brain. But that seems like an odd view for a Western physician to hold. I'd greatly appreciate any thoughts on this.