Widow Cob and the spinster Daff
Together cobbling a crafty craft
A wily web stretched across the path
To snag unwary pedlers as they pass
Bind him, cocoon him, store him for later
Suck out his blood, his plasma, his water
Leave him a husk, a convenient cob
Cob upon cob upon cob upon cob
Builds to a new cottage for Thingamabob.
The cob in cobweb means a lump, as are the cobs from which cob cottages are built.