The line comes from Big Clive, the electronics creator known for taking apart gadgets, torches and household devices in a calm workshop style. During one teardown he introduced an item as the soon to be moist internally thing, and the unintended innuendo made the moment stand out from his normally technical commentary. Shared as a short soundboard clip, it survives because the contrast is instantly clear even without the original video, giving creators a ready-made awkward reaction for wet, damp or accidentally suggestive scenes.