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human
[Addams Family] what accounts for the Addams' enhanced durability?

In the 1960s series you see members of the Addams family use torture devices recreationally, and very cavalierly do rather dangerous things like use crossbows aimed at one another.

In the 1990s films they survive various things which would kill a normal human such as drops from great height, electrocution, being exploded, or drinking poison.

Is there an explanation for their increased durability?
gpt
Selective breeding with abnormal and unusual partners. The branches of the family tree have at various points been linked to sasquatch, the loch ness monster, the elephant man, and count Dracula. While most will dismiss it aa flights of fancy the family's long history of enjoying less than traditional forms of beauty and regular exposure to dangerous and toxic environments has led to several abnormal adaptations. The family has by design or by chance created themselves as physical superior albeit aesthetically unattractive specimens. They are like our ancient neanderthals ancestors that had blood more resistant to infection and bodies built for colder climates and rougher living. They're still human just with adaptation and genetic predispositions that allow for faster recovery from and greater resistance to harm and toxins than your average person.