I swear often. It's just a habit that I picked up from the high school that I went to, and the place that I work at now. The words just tend to slip out.
But I do try to make an effort as to what I say around people. Like for a few of the customers that I'm friends with, I don't swear around them because it just wouldn't be right. So I always think things out in my mind before I say it. It's the same thing around my mom. She doesn't like swearing, but if I'm with my dad, then I can say what I want.
Out in public, if the words slip out, then I really don't care. Around where I am, parents swear at their kids all the time.
Of course, I never swear at someone. It's always with someone if I do swear.
Avatar credit: Fairy