And if its too late and the cake is now eaten by them, go piss on her toothbrush.
After being the recipient of a load of shit like that from someone, completely undeserved, basically their just being a fucking turd. I did that once or twice to them in the past. And on one occasion at least, urinated in their bottle of mouthwash. The mint flavour (of the mouthwash, obviously, whilst I have never attempted to taste it, I very much doubt my piss tastes like mint. I certainly do not, at any rate, ever recall using a polo as a cock ring.)
Although I did once do something to a girl which involved the digital application of mint oil to certain areas of her biology. Rather fun, as I recall. (it should be diluted, and spearmint is better and gentler than peppermint, if anyone is going to try it. I suppose mint candies could be inserted also. And searched for with one's tongue, for that matter)