I'm scanning some 35mm negs from Saturday night, and I came up with a slightly more efficient way to get them out of the holders and get the next set of negs into the holders. Which prompted me to think "if you don't know how to handle negatives, you have no business being a film photographer." But then it occurred to me that the first half of that statement could be applied to life, thusly: "If you don't know how to handle negatives, you have no business interacting with people."
Or something.
How would you finish that phrase?