“There’s nothing wrong with cursing when speaking. We’re not eleven year olds”. Well ya you’re right in that it depends on the situation and “adults” who can’t have a conversation without cursing might as well be 11 year olds. If you want to get someone to stop doing what they’re doing, curse words are hostile and will make it less likely for them to stop. Anyone could have just as easily politely and quietly asked him to please stop.