So a while back I thought I'd be clever and post something entitled “Laptxp Pxrnx” (where x = o). It was completely innocent and simply depicted my three laptops strutting their stuff. They typically do not wear clothing and thus I had no compunction about posting photographs of them in their natural state.
Well, just recently I've begun to get a flurry of hits from Google (mostly from image search), and I'm confident that the massive amount of referral spam I get is at least somewhat related. Moreover, I am actually frightened by some of the search terms I see in the referrals.
Out of this I have distilled a moral: Avoid using naughty terms, even when you meant no harm. Google does not know intent, and dirty dirty people will stumble across your website. :)
(Btw: I am probably just improving the pxrnx post's page rank by linking to it above... ugh...)