bing-bong
Explanation
A couple is shown at what appears to be a bedroom doorway. The woman tells the man: "Before we go to bed I should tell you, when I like a, like a very powerful climax, I say 'bing bong bing bong.'" The man asks, "Like a doorbell?" She confirms: "Like a doorbell." The caption below reads: "With advanced planning, it was much easier to fake multiple orgasms."
The humor comes from the reveal in the caption. What initially seems like an intimate and slightly quirky confession -- a woman sharing her involuntary exclamation during orgasm -- is reframed by the punchline. She's not actually describing a genuine response; she's strategically pre-establishing a signal so that she can more convincingly fake orgasms later. By telling him in advance what to expect, she removes any suspicion when she deliberately makes the sound.
The joke plays on the well-known cultural trope of faking orgasms, but adds a layer of comedic premeditation. The "advanced planning" makes it sound like a business strategy or military operation rather than a spontaneous intimate moment. The choice of "bing bong" as the sound is deliberately absurd and unsexy, making the whole scenario even more comically implausible.