Not to digress too much, but aquinas mentioned something I just heard about on NPR: autonomous sensory meridian response. ASMR is a real thing, different people have different triggers, which for you are perfect fifths and octaves.
DS15 has talked about synesthesia for years, I didn't know about the cuisine ire, etc. Now I'll have to review his connections with him to see what it is! And BTW, I used to think I had it, but was probably influenced by my obsession with color-by-number sets when I was a kid.
