I think MTed's explanation above, notwithstanding that it works, (which it does,) should serve as a warning to parents not to expose their children to diminished, augmented, maj7th chords,and the like or they might turn out like MTed.

Let us restrict our musical excursions to major and minor chords, brethren, only therein may the truth be found. (Dominant 7ths allowed, but only sparingly, and as a last resort.)

Hallelujah.

Murray