There's a joke about the human body parts, all communicating, and they all say they're fine. Only the butthole complains, saying it doesn't feel like working. The moral of the story is that it just takes one a$$hole to wreck everything.
Similar to
jammied's wisdom, but funnier, IMHO.
Or the late Norm MacDonald had a joke about his uncle. They're walking along and the uncle says, See that library, I helped build that. But they don't call it Jack's library, no one remembers. A little later, the uncle points to a barn with a similar comment. A little later, a hardware store, saying, That was mine, I built up the business, and now it's a success, but do people say, Look at Jack's hardware store. Nope, all forgotten.
But have sex with one goat....
(At that point Norm ends the story, but it's quite true. You're far more likely to be remembered for the bad things you've done. We don't think of rushing for an incredible number of yards when we think of O.J. Simpson).