In his essay "The Poet as Translator", Kenneth Rexroth asserts that the translation of poetry into poetry is an act of sympathy and the prime criterion of successful translation is assimilability.
Your humor must be relevant to the audience and should help to show them that you are one of them or that you understand their situation and are in sympathy with their point of view.
Mental health allows us to view others with sympathy if they are having troubles, with kindness if they are in pain, and with unconditional love no matter who they are.