My favourite form of humour has and always will be sarcasm.
My only grouse with it is that its subtle variations are often lost within the confines of the written word.
A verbal duel, with sarcasm at the forefront, often the scene at everyday marital fights is a scene to behold.

The hallmark of a true master is when the true meaning dawns upon everyone except the very person the taunt was aimed at.... that too without the usage of imperfectly distributed information.

A straight face, a tone which never betrays its owner...... stuff legends are made of.