When I met my current partner, I hardly swore. Not because I was a goody two-shoes, but just because I rarely heard the words in use except the odd movie or odd persom coming across some mishap The only time I heard searing regularly post secondary school was my ex-finacee's sister who was going through a mid-life crisis (yes, women get them, too) and wanting to be cool interweaved shit with every day parlance, and she had 4 young kids at the time. I noticed the people she hung out with were of similar behaviour - but shit that was about it,, I don't even remember then using the C word (as in "crap", not that C word).
But, these days, I swear like a trooper - but only when angry or frustrated. Since I joined banking, everyone uses the F bomb and the like in normal parlance amongst peers they know will not take offence, though the C word is still rare. My old manager of about 7 years ago, however, used the C word regulalry, but I always thought it was quite derogatory and unwarranted. My son uses the F word in regular parlance with his mates; my daughter less so.
Language does evolve. Apparently the F word was not vulgar many years ago.
I heard something in London I haven't heard for years.. Amongst a group of young-ans with thick Aussie accents, one of them blurted, "they call all go and get f'ed".. Brought a wry smile to my face.