Adult film star Sasha Grey knows that when animals are involved, you should always say "No" to sex. That's why she's baring it all in PETA's newest ad, which the porn legend and star of Steven Soderbergh's critically acclaimed The Girlfriend Experience unveiled after delivering the keynote speech today at the Adult Entertainment Expo in Las Vegas.

Grey is urging everyone to help curb the companion animal overpopulation crisis by spaying and neutering their dogs and cats in order to prevent pregnancies. Each year, up to 8 million dogs and cats wind up in U.S. animal shelters, and about half of them must be euthanized because of a lack of suitable homes. "I think spaying and neutering is incredibly important," said Grey. "[I]t keeps the animals out of the shelters and there's too many unwanted animals out there already." Um, I know it's only been a week, but can I make a nomination for PETA's Woman of the Year for 2010?

Written by Logan Scherer

Ron Jeremy has been, um, a really big supporter of PETA's work to help cats and dogs for a long time, and this Friday he took some time out of what I can only imagine was a ridiculously busy night at the Adult Entertainment Awards in Las Vegas to unveil his "Too Much Sex Can Be a Bad Thing" ad, aimed at reducing cat and dog overpopulation by promoting spaying and neutering.

Here are a few pics from the event, followed by Ron's awesome PSA for us. Admittedly, this may not be the first time that Ron Jeremy has posed naked for the cameras, but it's a hell of an ad nonetheless. Oh yeah, and the shirt he's wearing in these pics is priceless ...