(warning language in video may be offensive)

One man learned a very valuable lesson after cheating on his girlfriend: If you're going to be unfaithful, don't leave your appendages vulnerable to a fiery attack.

After finding out that her man had slept with her co-worker, an unknown woman decided to get some payback against the very body part he had strayed with.

In the video, the man is seen fast asleep in a white bed wearing just underwear and a pair of high socks.  A woman, presumably his girlfriend or wife, whose face cannot be seen, carefully and quietly removes the blanket that is partially covering him.

She then opens a bottle of nail polish remover and slowly pours some of the liquid over the groin area of his underwear.

It's only on fire for about a second before her boyfriends jolts awake, screaming and batting at the flames.

'You cheating on me with my co-worker, you didn't think I was gonna find out?' she is heard saying as he rolls over and moans, holding his crotch.

'Get your crap and get out,' she says, as he falls off the bed and stumbles off camera.