Whoever cooked up KFC Australia's latest marketing stunt is either in hot water or in line for a big promotion.

In an extremely short-lived social media campaign, the fast food chain on Friday morning released a raunchy image on Twitter showing a man and a woman sitting in a provocative position on a couch.

KFC was quick to remove the post that caused the controversy.

The man leans back and grins towards his pixelated crotch, where the woman's hand is reached.

"Warning," the post said. "Something hot and spicy is coming soon ... "