The Serious Note and Squirrel

On a deeply serious note - sat a squirrel.
The note was written on parchment,
and had been blown by a desk fan into the street from a window.
There wasn't much written, to be honest,
just,
'O my deepest love - how the very fibre of my trousers rattle for you -
Just nipped up the bookies, back in 30 mins. Cheers.'
The squirrel, upon realising it wasn't for him,
Used it as a shopping list.