Give Back The Key To My Head

Any fan of The Mighty Boosh will find this image (on one of my new favorite blogs, Crap Jazz Covers) very familiar.  It got me wondering, what are the roots of the "door/window in the forehead" image?  Has anyone done a typological study of doors and/or windows in foreheads?  Is there a long thread about it on some Mighty Boosh message board? 

The original appearance of Rudi in Boosh Series 1 reminded me of that one scene in Cocteau's Blood of a Poet, but where did they get the door?  An old psych album cover?  Or did it just come naturally from some combination of the phrases "open your mind" and "doors of perception"?  Actually, that's probably it.

Unanswerable Question

Lots of people really hate smooth jazz. But who hates it the most?

- A classic/mainstream/straight-ahead jazz fan or musician, who might hate it the way a particularly devout, hardcore Catholic hates a Lutheran

- A punk or metalhead, who would probably consider it the absolute antithesis of what they're into

- An avant-garde/"out" jazz fan or musician, who might already have a gripe with the word "jazz" and would be especially bugged about their music being considered even a distant cousin to the smooth stuff

Something to think about next time you're in the dentist's chair.