Fuck. Shit. Bitch. Cunt. I remember reading somewhere -- a very long time ago -- that these "hard" sounds are virtually necessary in profanities. The explanation I roughly remember is that because these "hard sounds" are unmistakable, that is, because there is no half-hearting them in phonation, that lends to them to use in words that one wants to be unmistakable in intent, e.g, in profanities where one wants to intensify a phrase or rile someone up. I remember these being called fricatives.
Unfortunately I'm not a linguist, not even a fair amateur one, and when I went to check Wikipedia for the definition of fricative, I really couldn't make heads or tails of the lingo. I have no idea what those weird letters or the adjective "voiceless" mean. Moreover, I think I'm just plain wrong about those sounds being fricatives -- the examples I found on that page don't seem correspond very well to the hard sounds I mentioned above. My memory about what I read is obviously horribly dashed. Am I in fact correct in observing that profanities tend to have "hard" sound somehow, and if so, could someone give me a name for them so I can go about content I know something really cool?