there are people having a private conversation , some don't want others to hear it and wouldn't want others to join in the conversation. so, not to be labeled as an intruder rather have some manners. this could also apply to some boy / girl relationships that doesn't mean you are together you both don't have time to be with other people like your friends. it's good to unwind and interact with others. so in this scenario when your guy or girl is talking to others don't just interrupt and show some attitude. just don't plunge in yourself.
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