After the 5th time of him listening to it and telling me there was a swear word I gave the song a listen. The S word that was the bad word in the song? Stupid. That led to a whole discussion of what bad words and bad bad words are. I then had to discuss with him when using the word stupid was ok (like this game is stupid) as opposed to when it was not (calling someone stupid).
This makes me wonder what other words I am going to need to explain. I need more wine.