I am a 21 year old female. I don't really swear, or say swear words unless they are part of a title, like in a song or movie, etc, when others are around.
But, when no-one is home, and I live in a rural area so I know the neighbours can't hear me, I like to yell swear words, and say rude things.
Like f**k, c***, sh*t, penis (I particularly like yelling out PENIS really loudly, and repeating the word), and I would say out loud some of my sexual fantasies (though I generally don't yell them).
Hey, it IS fun!
I also think it's just fine to do. It could help get rid of stress, anger, or just plain hornyness.
Besically, if you enjoy it, and it's not hurting you or anyone else, how could it possibly be wrong? It can't.