btw I have found my brother swearing funny before. Obviously I've tried not to show that, as he would have done it again. But to me, as long as it's a one-off thing because he's heard it at school and repeated it, I think it's amusing because it's something you don't expect from a kid, but which is actually harmless really (the word itself I mean, obviously if he went up to the teacher and repeated it he would be in trouble)
I find youtube videos of parrots swearing pretty funny too
If I hear kids swearing as if they do it all the time though, then I don't find it funny. But the occasional one you get from little children who've heard it but don't understand it? I do find that funny. Well, I guess it depends on the level of it really. A "mild" swear word is funny. If I heard my brother say Cunt I doubt I would
I think I;d just be shocked haha