pro-tip
Explanation
The Joke
The comic is titled "Relationship Pro Tip" and advises that the best way to end any romantic sentence is to append "but that will not save you in the final showdown" and then say no more. The example shows a husband telling his wife: "When I married you, I knew I had a good friend and a good soul, and you'd always be a perfect mother to our children." The wife responds warmly, "Thank you, honey, I love you." Then the husband adds: "But that will not save you in the final showdown." The wife reacts with alarm: "Stop it! WHAT?!"
The Humor
The joke works by exploiting the structure of heartfelt romantic declarations. The "pro tip" format sets up the expectation of genuine relationship advice, but the suggested addition is an ominous, context-free threat that transforms any loving statement into something deeply unsettling. The phrase "the final showdown" is deliberately vague and menacing -- it could imply anything from a marital argument to an apocalyptic confrontation. The comedy comes from the wife's perfectly reasonable horror and the instruction to "say no more," which maximizes the disturbing ambiguity. It parodies the genre of earnest relationship advice while also playing on the trope of ominous prophecies delivered in otherwise mundane settings.