Also, on a rather interesting note, I read somewhere that fucking once described an act in which a person who sowed/planted seeds in a field, and those particular people were referred to as fuckers.
The guy who quoted Monty Python had it wrong. I believe the quoted text is attributed to George Carlin.
I don't mean to tell you how to do your job, but GO FUCK YOURSELF!
Fine, I'm sorry, I'm sorry, UN-fuck you!
Cartman: Don't call me fat, you fucking Jew!
Mr. Garrison: Eric, did you just say the F-word?
Kyle: No, he's talking about "fuck." You can't say "fuck" in school, you fucking fat-ass!
Cartman: Why the fuck not?
Mr. Garrison: Eric!
Stan: Dude, you just said "fuck" again!
Mr. Garrison: Stanley!
Mr. Garrison: Kenny!
Cartman: What's the big deal? It doesn't hurt anybody. Fuck-fuckety-fuck-fuck-fuck.
Mr. Garrison: How would you like to go see the school counselor?
Cartman: How would you like to suck my balls?
Mr. Garrison: What did you say?
Cartman: I'm sorry, I'm sorry. Actually, what I said was... (picks up a megaphone) HOW WOULD YOU LIKE TO SUCK MY BALLS?
Stan: Holy shit, dude.
-from South Park: Bigger, Longer, and Uncut-
Person 2: Why yes, I do FUCK.
Person 1: FUCK is sooo good!
Person 2: Yup, FUCK sure is. :)
Person 1: I am FUCKing right now.... :D
Person 2: Oh indeed.