You know, I have to give Pornstar Sasha Grey a high five for taking a stand with PETA, or the People for the Ethical Treatment of Animals, to encouraging pet owners to spay and neuter their pets.

Sasha Grey declares “Too much sex can be a bad thing”, for dogs and cats, that is – in a provocative new PETA ad in which she’s shown posing nude in a bed. Sasha will be unveiling the campaign after she delivers the keynote speech at the 2010 AVN Adult Entertainment Expo in Las Vegas.

Sasha Grey is the latest celebrity to appear in PETA’s ad series that is aimed at reducing dog and cat overpopulation by promoting spaying and neutering.

“I think spaying and neutering is incredibly important,” said Grey in an exclusive PETA interview. “It keeps the animals out of the shelters and there’s too many unwanted animals out there already.”

Each year, up to 8 million dogs and cats are dumped at U.S. animal shelters, and about half of them must be euthanized because of a lack of suitable homes. Sasha urges all her fans to help curb the overpopulation crisis by spaying and neutering their dogs and cats to prevent pregnancies.

The ad was shot by renowned celebrity photographer Andrew Southam.