Black Widows In The Privy

Everyone knows someone we'd be better off without,
But best not mention names for we don't know who's about,
But why commit a murder and risk the fires of hell,
When black widows in the privy can do it just as well.

Now poison's good, and daggers, and arrows in the back,
And if you're really desperate you can try a front attack,
But are they really worthy of the risk being caught
When black widows in the privy need not to bribed or bought?

So if there's one, of whom you wish most simply to be rid,
Just wait 'til dark then point the way to where the widow's hid,
And they to them, "I think you'll find that this one is the best,"
And black widows in the privy will gladly do the rest.