Maintaining that the network has a tradition of rejecting advocacy ads for the Super Bowl, CBS won't run commercials for PETA or MoveOn.org during the big game on Sunday, Feb. 1.

While the network insists that dozens of ads from advocacy groups have been rejected in the past and that it is CBS' policy not to run commercials dealing with "controversial issues of public importance."

The spot from People for the Ethical Treatment of Animals features two attractive women and a meat-eating pizza delivery man. In the conventions well-established by many an adult movie plot, things begin to get amorous only to fall apart due to his failure to perform.

"Meat can cause impotence," reads the punchline.

"CBS has no problem airing commercial after commercial advocating the consumption of fried chicken, pork sausage, and fast-food burgers, even though eating these products is making Americans fat, sick, and boring in bed," says Lisa Lange, PETAs vice president of communications. "Considering that our ad has all three of advertising's most popular elements -- sex, humor, and animals -- the network should jump on it."

PETA argues that previous Super Bowls have featured anti-smoking advertisements which also come from advocacy groups.

The liberal MoveOn.org site had hoped to run a spot which asked the question "Guess who's going to pay off President Bush's $1 trillion deficit?"