Thanks, I'll admit I didn't realise.
Though I get the impression that "from here" isn't quite correct either, at least not in the current meaning of the phrase. I am probably wrong but my understanding was that it has a meaning closer to "from here comes..."?
(Me, I'm not... in any way intoxicated, Thu 31 Mar 2011, 18:29, 1 reply)

S'okay
Genitive is more usually "of" something, though (apparently) "hence" really is the genitive of "here". And Modern English isn't an inflected language for the most part, so the usage is going to be pretty blurry.

But you're still right - "hence why" is redundant. "Hence" is pretty archaic anyway, the scriptwriters on Friends should've said something more like "that's why...", but if they were any good they'd have steered well clear of the mawkish and clunky humour of that twinklefest of unfeasibly good-looking metropolitan chums anyway and written something good instead.
( shinyshinyscalp less a man, more a way of life, Thu 31 Mar 2011, 18:47, closed)