 Satire is usually meant to be funny, but its purpose is not primarily humour as an attack on something the author disapproves of, using wit.A common, almost defining feature of satire is its strong vein of irony or sarcasm, but parody, burlesque, exaggeration, juxtaposition, comparison, analogy, and double entendre all frequently appear in satirical speech and writing.The essential point, is that "in satire, irony is militant."