Tonight on the bus, I noticed that the young boy beside me was using the same English swear word over and over again. I felt very annoyed and wanted to explain to him how he was being very rude, but I let it go. It was late, hot, and I didn't want to give him the satisfaction that I spoke English and understood the profanity he was throwing around. I've discovered that people will sometimes test if you speak English by repeatedly saying English swear words really loud and seeing how you react. I don't recommend this method.