>Sure, you let some steam out. I understand that but why put in writing? Let off steam / save mental effort regulating what you say / indicate to the person yo

>Sure, you let some steam out. I understand that but why put in writing? Let off steam / save mental effort regulating what you say / indicate to the person you are speaking to that you are comfortable being 'unprofessional' I also know someone who intentionally swears a lot in interviews as a filtering mechanism, that's probably less common though.