Most kids I know get it from the parents. I have some buddies that can’t put more than 3 words together without one of them being the F word. They talk the same around their kids, grandkids, or anyone that’s around them. My parents have never said that word in front of us and we don’t ever say it around ours. I know our kids say it but they never have and better never say it around us. Especially their mother. I’ll say around my buddies but not very often. I have one buddy that will use it no matter where he’s at or who he’s around. I have to get on him sometimes. He don’t even realize he’s saying it around other people.