In my opinion, cursing in general is pretty tasteless. It's not exactly a behavior to admire.
^^ This, right here, is on the money.
Interesting discussion. The answer to the query is ultimately decided by one's personal moral standards, otherwise there is no absolute guideline for when it is acceptable for a young individual to use profane language. Also, depending on how one was raised, some terms others find derogatory, might seem like every day language to the other. If you were raised on a farm, it might seem normal to use slang words referring to dung in any typical conversation. Not always the case but it's an example.
Now, if you were born in the UK, a certain term might seem offensive to you, but to the majority of Americans, it's just a silly word. So what counts as profanity is determined by region and dialect, many times. So, if I color my speech with this foreign word in America, where no one thinks I'm cursing, am I really cursing? My British neighbors would certainly think so.
Finally, since we cannot set the moral standard, it is only a matter of opinion. Personally, I find it shows a lack of thoughtfulness, lack of self control, when overused in comedy a lack of genuine humor, and I generally don't feel I wish to associate with people who fancy that sort of sailor talk. It's unprofessional and off putting.
Anyway, interesting discussion.
I fancy myself warm beverages.
And this girl...