Men in the new office apologize to me for cursing or being too loud even though I didn't say anything. Why?

I don't even display any annoyance. I went to sit my them and they were immediately like we will behave ourselves and not curse or get loud around you. I am a quiet girl but I don't really mind how they behave. So why did they start with that?

Men in the new office apologize to me for cursing or being too loud even though I didn't say anything. Why?
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