Gay media watchdog group the Gay & Lesbian Alliance Against Defamation (GLAAD) leveled an allegation of a “homophobic double standard” against CBS over its decision not to air an ad for gay dating site ManCrunch.com during the Super Bowl.

In a statement released Friday, the group cited CBS' decision to air an advocacy ad featuring football star Tim Tebow by the Christian group Focus on the Family as proof of bias. While the ad is not anti-gay, the group does oppose gay rights.

“CBS has a problem when they do something like this at the same time as they allow an anti-gay group like Focus on the Family to place ads during the Super Bowl,” Jarrett Barrios, president of GLAAD, said.

“This network should come clean to the public about what's going on because this seems to be a homophobic double standard,” he added.

The exclusion also drew a sharp protest from ManCrunch.com executives.

“We're calling on every same-sex advocacy group to petition CBS and let them know this … behavior will not be tolerated,” the Toronto-based dating site said in a statement.

In the 30-second spot, two men, each rooting for the opposite team, share a passionate kiss after their hands brush each other in the potato chip bowl. The ad can be seen at ManCrunch.com's website and has racked up more than 15,000 views on YouTube, the video sharing website owned by Google.

CBS has reportedly told media outlets that it turned down the ad partly out of financial reasons.

But Elissa Buchter, a spokeswoman for the website, said CBS called the ad “not within the network's broadcast standards for Super Bowl Sunday” in its rejection letter.

Super Bowl XLIV, between the Indianapolis Colts and the New Orleans Saints, will take place in Miami on February 7.