If I could be who you wanted

As I mentioned last month, I went to see Radiohead at the weekend and, as expected, they were staggering - for reviews of the gig, the set list and other good stuff, check out the impressively comprehensive Green Plastic. For me, the undoubted highlight of the night was a beautiful rendition of Fake Plastic Trees from The Bends, my favourite Radiohead album. Here are the lyrics, more or less:

A green plastic watering can,
For a fake chinese rubber plant,
In fake plastic earth.

That she bought from a rubber man,
In a town full of rubber plans,
To get rid of itself.

It wears her out. It wears her out. It wears her out. It wears her out.

She lives with a broken man,
A cracked polystyrene man,
Who just crumbles and burns.

He used to do surgery,
On girls in the eighties,
But gravity always wins.

And it wears him out. It wears him out. It wears him out. It wears him out.

She looks like the real thing,
She tastes like the real thing,
My fake plastic love.

But I can't help the feeling,
I could blow through the ceiling,
If I just turn and run.

And it wears him out. It wears him out. It wears him out. It wears him out.

And if I could be who you wanted,
If I could be who you wanted,
All the time, all the time...

So what do these lyrics mean to you? Are they about Canary Wharf, as Green Plastic seems to suggest? About mass marketing spiralling out of control, as postulated on this song's Wikipedia entry? Or about two people trying to make a relationship work when at least one of them doesn't think it can, as sadly suggested by my gig-going companion?
Answers on a postcard to the usual address... or, you know, you could just comment...