It is kinda like the time I washed my ass with that rag under the bathroom sink that had all the Comet left on it. I accidentally used it and it burned my ass for a few days before finally I rinsed it off.
That was a big mistake. If you do scrub your ass with comet. Make sure to rinse that shit out right away. Don't let it fester, otherwise it stings like fuck. Your ass will end up with blisters on it. And explaining to your girl friend how you got infected blisters from scrubbing your ass with a comet soaked rag is difficult. I don't care how understanding she is.