I’m always pretty amazed at the way my adult children (those in their twenties, the two in their forties are completely different), speak to each other and their friends.
They rarely swear at me and visa versa and if we do it’s normally the result of a big row.
They don’t swear in public nor shout in the street, but in the house or online or the phone their language is very blue!
I take the view that they are simply “words”, often the word “very” appears to be replaced with the “f” word.
My own children, all of them, never swore in front of their grandparents, nor do they swear in front of their 11 year old nephew or any of my friends.
I don’t particularly like hearing them swear, but I’m also not shocked or offended.