In High School life started to get frustrating enough that I found real opportunities to apply the swear words...in my head, still not out loud.
By college I used them freely, when warranted.
In my 40s sure I still use them, when I'm really angry about something, and occasionally when I'm really excited about something... but not all the time and I don't understand why anyone would. Maybe it's because I hear them way too much. In my neighborhood (the hood) fuck is an all-purpose word, noun, adjective, verb, adverb, and often used as a proper name or the replacement of such. It gets old. I hear it screamed outside my windows all the time.
Someone I know said that she was surprised when I mentioned the overuse of swearing because I was "one of the most liberal people she knows." Sure, I still am, but I also like language, and some variety in it.
There is a brand consultant that several people I know follow (including me) who swears to excess in her writing - and she's proud of it. For her, with her back story, a lot of the time it works. But there are times I can't even finish reading her blog posts because I'm weary of the swearing.
If someone just cut you off in traffic and caused your life to flash before your eyes? Swear it up. If you had a crappy day? Swear words are in order. If you just found out you're going to be a proud new aunt/uncle/grandparent and you're so excited you can help but slip some expletives in there? Cool.
But when we are having our first few words in the morning and I'm still sleepy and getting my bearings? I don't want to hear it. If I'm trying to have a serious discussion with you about business? No. It's crude.
There's always a time and place where that language makes sense, but it also gets to be too much all the time. There are so many other lovely adjectives, and adverbs out there that are more succinct and descriptive than variations of fuck.