Swearing

I'm guessing I'm in the minority here, but why do people get so pissed off over swearing?  Now, I understand that some are raised in certain environments where they are told how evil four letter words are.  But it still shocks me when adults, people who are supposed to be able to think critically about their beliefs, start slinging shit when they hear someone curse.

What the hell?  It's interesting as well when someone tells you to "grow up" because you swore.  To me, not being able to tolerate certain words (that aren't used in an insulting way) is far from being grown up.  Not that I'm trying to belittle anyone here, but why is this such a problem for some people?

I spend a lot of time analyzing my beliefs and thoughts, trying to understand why I think the way that I do.  Maybe that's why I'm curious what makes someone get so fucking angry over swearing.

Obviously, it's a part of certain cultures, but c'mon.  Use your goddamn head.  I actually read a review for a horror movie, that said they couldn't finish it because of all the swearing.  A horror movie had too much bad language?  The blood and guts was OK, but don't you dare put a couple of sounds together in a way that is somehow offensive.

Shit.