A standard example I used to cite to illustrate the difference brought about by safe-search was an image search for 'facial'. With safe search off, that filled the screen with NSFW results.

I just tried again, and the results were squeaky clean even with safe search off. Adding the 'porn' term reproduced the old behavior (in spades). Nice job, Google!

Of course, if you want true porn, you've got to spell it pr0n. That causes Colonel Gadaffi to appear in the first row.