I'm quite insulted. There is simply NEVER a time when vulgarity is acceptable. I don't care the situation. That any of you find it even remotely acceptable tells me that you are not people I would want to associate with. I never use that sort of language. NEVER. And during a class I make sure all the students understand it's not acceptable during the class. I have no problem politely refunding their money, minus deposit, if they cannot conform to those standards for the duration of the course. What a perfectly sad world we live in that any sort of foul language is "commonplace".