Help me explain to 5yr old why we don't swear

[RapunzelsRealMom]

DS's friend told him the word Fuck. They both know it's 'naughty' but not why.

He came to me this evening saying, I know the F word.
I asked him to whisper what word it is and, yes, it's Fuck
So I was calm and explained it's called a swear word and it's not very polite, we don't say this, if he wants to say this when he's a grown up that's fine but it's not a nice word.

He's being very reasonable and keeps asking why? Why is it not nice? Why aren't we allowed to say it? I've drawn a blank!!

My older kids just accepted that it's not nice to swear and that was it. DS is making me work for this one!!

Does anyone have any better age-appropriate explanations please?

It's quite refreshing to come across someone on here who doesn't think it is acceptable to use the F word (never mind the C word). I don't like to hear those either and it's a shame when children hear grown ups using those words.

He'll probably stop asking you about it in a while so don't worry. You could just say they are words that some (ignorant) grown up people use when they can't explain things. Not a very clever thing to do. Then forget it.