it is called laugh and be fat and it is a bunch of stories and jokes and is just the most obscene , dirtiest thing i have ever read , and , as i tell mairead , i have read the decameron as well as the canterbury tales , mind you , and so , of course , we are soon snorting and burying our faces in our pillows , we 're in highest gross hilarity and rolling around in the bed in pure hellish joy .