I learned most of my cussin' while employed by and elder and his son in a tool and die shop right after I got out of school.
They would go at it about shop problems. They kept a keg of beer in the shop refrigerator too, so a big lunch time beer was normal for these two. What fun!
I think the best one I ever heard was a golden boy elder making sexual references about his wife in my presence. I thought he was talking about a hooker until her name popped up. What a creep!
I can raise a blue streak in the right company but still try to watch what I say around kids and ladies..... Manners are important.