PETA loves to get normally-clothed celebrities to strip down for ad campaigns, but with the addition of Sasha Grey to the stable, the animal rights organization “is basically a porn site now,” writes Jen Carlson on Gothamist. Grey is, of course, “the charming young lady you've seen in films such as f--- Slaves”—ie, an actual porn star. Check out her ad, as well as a few other recent naked ladies courtesy of The Frisky and PopEater, in the gallery. (More Sasha Grey stories.)