capital-2
Explanation
This single-panel comic shows a woman with glasses walking into what appears to be a sex shop, saying to the person behind the counter: "Hello. I'm interested in substituting capital for labor."
The caption reads: "You could always tell when the person buying the sex toy was an economist."
The joke is a double entendre built on economics jargon. In economics, "substituting capital for labor" means using machines or equipment (capital) instead of human workers (labor) to accomplish a task. This is a perfectly standard concept taught in introductory economics courses. However, in the context of purchasing a sex toy, the phrase takes on a hilariously literal meaning: replacing a human partner (labor) with a device (capital).
The humor comes from the character being so steeped in economic thinking that she cannot help but frame even the most intimate personal purchase in the dry, clinical language of production theory. The caption reinforces this by treating it as a recognizable type -- the economist who sees the world entirely through the lens of their discipline. It is a joke about how academic specialization warps the way people talk about everyday life.