I remember reading an article by some 19th-C thinker (I can't recall who it was) who observed some apple pickers at work. He commented on their speech, which was coarse and obscene.

In that writer's day, men who talked like that were illiterate. Neithr could go on the Net and talk their own talk. Journalists and novelists wouldn't replicate it. So today, we think that people of the past had much cleaner mouths.

Trouble is, that kind of speech degenerates from a form of expression to a form of laziness. It is so much easier to say "Where the hell is that hammer?" than to say, "Fetch me the ballpeen hammer that I had yesterday and probably left at the other job site."