My mother didn't like the use of vulgar language. As a writer, she thought it was unnecessary. My father swore occasionally, sometimes invoking "dogs' blood and cholera." No car trip was complete without him shouting "Jesus Christ" from time to time. Early on, I wanted to be a journalist, and mainstream newspapers avoid curses and vulgarities. I rarely use them, unless I've hurt myself.
All of this is related to Echidne's post below on "suck jobs" as well as the fact that I'm about to eat a mamey. It's pronounced ma-MEE. I freeze when trying to say the word, lest I sound like I want to eat a mommy or that I'm using the preterite of mamar, to suck.
As far as I can tell, vulgarities involving sex are all gendered, and women don't end up on top, a phrase that also is gendered. Various uses of screw, f***, blow, suck and anal sex reinforce the idea that the one being penetrated (assumed to be a woman or a gay man considered to be acting like a woman) has lost power or control, as in being raped, or has been cheated, tricked, put down, or put in her/his place. Son of a bitch and bastard reflect poorly on mothers. And motherf***** often gets shortened to mother.
I don't care for this s***. I lean more toward damnation although I don't believe in it. What about you?