Parents, little kids, and girls I don't swear. I may slip, but it is few and far between. I don't really use big words either. I do think through most of what I say.
On the topic of big words, one of my professors make a bit of fun of me in class cause I don't have a huge vocabulary. With words like -- mortification, transcendence, unambigious, authoritarianism, and dissonance -- who would know what the guy is talkig about. I asked what dissonance means like five times last class, yet I still have no reply. When the word seductive came up, he made a smartass comment along the lines of "you know what that means don't ya." I laughed cause it was funny, but c'mon give me a break pal.