Plastic Bag Lyrics
1977 and we are going mad
1977 and we've seen too many ads
1977 and we're gonna show them all
Apathy's a drag
That corresponds, to all those ads
It sucks up all the rubbish
That is fed in through my ear
I eat Kleenex for breakfast
And use soft hygienic Weetabix
To dry my tears
With crossed and tangled lines
Contented with confusion
That is plugged into my head
I don't know what's going on
It's the operator's job, not mine, I said
Or tell you what I've seen
I've dreamt that I was Hitler
The ruler of the sea
The ruler of the universe
The ruler of the supermarket
And even fatalistic me
That corresponds to all those ads
It sucks up all the rubbish
That is fed in through by ear
I eat Kleenex for breakfast
And use soft hygienic Weetabix
To dry my tears

The intro declares "My mind is like a plastic bag," that is, cheap, disposable and can be filled with anything.

"i eat kleenex for breakfast and use soft hygienic weetabix to dry my tears my mind"
It's about how (as a woman especially) you just do what the (post-)modern world tells you to do to live up to what they expect you to do - eat stupid tasteless pop-culture breakfast to be normal, thin and bland while you use the scratchy, reality-based weetabix that could nourish to instead dry the tears your sense of humanity cries for lost chances to find satisfaction in real life and for the imposition of mass alienation that divorces us all from our true potential.

Great song from one of the real movers and shakers of the late 70's punk scene in the UK... RIP Polly, you were one in a billion.