Considering that the National Retail Federation predicts that Americans will spend up to $18.6 billion on Valentine's Day this year, it's only natural that companies will want to pull out all the stops for romantic promotions.

These are the Valentine's Day ads and promotions, however, that will have people wishing they were single.

As romantic as a Pizza Hut engagement package sounds, or the Bronx Zoo's campaign to get dudes to name cockroaches after their girlfriends, we'd rather pass on the promotions.

From insulting diamond ads that depict women as gold diggers to bizarre restaurant ads that depict forks fornicating, these are the worst Valentine's Day ads out there.