I grew up around farmers, drill rig hands, truck drivers, and diesel mechanics as my family owned a parts store and repair shop for big trucks and I worked there after school and during my summer breaks, and I can remember them using the MF word quite often. However, the ones who used the MF word were typically not the old school drivers and farmers,and MF was used far less than all the variants of the f word.
I can only recall the clients and employees using the C word maybe one or two times. It seemed to be an unwritten rule that you just did not need to say that one
My mom would have washed my mouth out with soap for saying either of these words, and my dad did not say much more than the occasional, hell, damn, shit sort of thing, and he just did not say words that degraded female or male anatomical parts. His example of class and keeping ones personal dignity was by far a more potent shaping factor for me than was the threat of soap and tobasco sauce.
The funny thing is that during my last job in the tourisim industry, I worked with a crew of almost exclusively women, and they would say dik(specifically the slang name for the male genitalia) and all the variants and call men dyks and oddly enough women as well all the time without any reservation. However, these twenty somehting women would only bring out the C word when they were fighting mad at another woman, and if a man said the c-word than he was according to them "a real BIG dick" and then some.
This seems to be the same at my new day gig as well, and quite frankly I find it odd that these professional women with degrees and advanced degrees get so offended when the C word was brought up but call male staff, female staff, and clients be they male or female diks along with the variations all day long and not think anything of it.
So do women just not view their use of the d-word as offensive and degrading to men in the same way that they see the use of the c-word by men and women as offensive and degrading to women? A good many women on EF have no reservation about calling guys and likely other women "dicks" but they get pretty sensitive and offended when someone uses the C-word.
From my dads example and philosophy I would find the use of the C word to be more offensive and degrading to women in general and more compromising my own personal dignity if i were to use it. However, he would not stand for me using the MF word either. I guess my parents were just uber old fashioned
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Some dudes have some seriously bass-akwards wiring 
