Paper napkins.

I always have paper napkins on me.
In pockets in my dress, in my bag, used as bookmarks in books,
in my make up bag, in my wallet, on my desk, by my bed
on the coffee table, in my Parker pockets, every-bloody-where.

But I have no idea how. I don't buy them.
I don't ever remember picking them up.

I must have an infestation.