It's All Been Done Lyrics

Lyric discussion by DarwinsMonkey 

Cover art for It's All Been Done lyrics by Barenaked Ladies

I too think there are references to the sexual part of a relationship becoming stale. To me "..before the fall of Rome" and "....before the west was won" are references to the time before virginity is lost (whose, it's not clear) - a time when everything is new an exciting.

And, as many others have pointed out, the reference to "fingers here" and "same three chords" is a not-so-subtle metaphore for a lack of sexual invention.

The last part shows that outside love/sex, it's almost impossible for things to be new and novel. The 30th Century/Price is Right line conjures the idea that in centuries time, we'll still be regurgitating the same old entertainment ideas. That bit is true already!

This is the best interpretation in my opinion.