I have a teenage son (almost 17) who has gotten into the habit of casually swearing. He uses the "s" word a fair bit as well as the "f" word in conversation. I tell him off when he does that in front me and try to get him to stop. My partner thinks I should just let it go and that its normal and as long as he doesn't swear in front of children or in an abusive manner (he doesn't do either) it shouldn't bother us when he does swear. I still bothers me when he does though, am I being unreasonable in expecting him not to?