"Obscenity (http://www.unpopart.org/manifestos/obscenity.html)" by Jim Goad
(text only, but NSFW -- but in a George Carlin/Lenny Bruce/Henry Rollins kind of way, it's something that "should" be read and pondered, if only just to "challenge yourself".)
"...You've probably pondered some of the same things, then swiftly swept them out of your mind due to the nauseating implications. ...If that's offensive, then so is the story of your birth. So is universal human reality. ...I never understood why certain things were unmentionable. If they exist, why not talk about them? The taboo never made any sense then, and it doesn't now. Peel away the layers of inhibition and illogic, and there's nothing left. No solid reason exists for getting offended by anything. If an idea can destroy your mind, then your mind is weak and deserved being destroyed..."
Well, there's this little thing called mutual respect. If you know I don't want to know about the content, viscosity, smell and mass of your poo (on a weekly average) then don't be surprised if I get a little disgusted with you for brining it up.
I say, if someone can't imagine someone else taking offence with what they say then THEY have the problem.