Sarcasm is biological - at least the ability to get sarcasm is biological - according to It's a right lobe thing. No, really by Jamie Talan in yesterday's Chicago Tribune:
Scientists have discovered comedy central in the brain--specific tissue regulating the ability to understand sarcasm.
People with damage to the right frontal lobe, right behind the eyes, are unable to appreciate this kind of humor.
Does this mean that depth of understanding / appreciating sarcasm can be genetic? Maybe our boy will start getting it sooner than later. He's going to need sarcasm, humor and irony as soon as he can find it in this family.