Re: 6/8 time...why not 3/4 time?
Apparently it's down to the fundamental note length not being 1/4 note, but half as much again, ie, 3/8ths (a dotted quarter-note in sheet notation). Three/Four time is typical of waltzes and has a ONE two three and ONE two ... beat structure, but I'm not sure how to describe how 6/8 time sounds, or even whether it necessarily has a fixed place to place the emphases.
Anyway, while reading this article, quite a few thoughts came to me. Several posters have brought some of them up already, but not all..
re: the xkcd strip... is the word order even right in that?
re: "kiss this guy" I believe (I read it somewhere on the Internet :) that Hendrix became aware of this mishearing and on some occasions actually sang the modified lyrics. Certainly one time I saw him on a BBC program it sounded more like "kiss this guy" than "kiss the sky" to me. Also, this:
I loved The Smiths, but lots of their lyrics were indecipherable to me... "horn-shoed bicycle on a hillside desolate???" And forget about My Bloody Valentine....
Getting back to time signatures, I hope you mentioned Time Out by the (sadly) recently-deceased Dave Brubeck. While he didn't write the famous Take Five with its 5/4 time signature, all the tracks on the disc have unusual time signatures. It still sounds great today...