The absence of sane

There once was an oven of toothpaste
And microwave, igloo and roof space
O the metatext rhymes
In a sign of the times
But it isn't really in good taste.

(Just to demonstrate that I can tell the différance...)

[ There was once a young lad from Penzance
Who was after a bit of romance
So he took a big chance
And asked "her" to dance
But it turned out that she was from France

There was once an old bloke of Vienna
Who'd churn out psychology for a tenner,
His name was Sig Freud
And he really enjoyed
Sex with a new Kenwood Blender

It was the strain on the fish
That turned me in brain
That and the absence of sane.