Little Black Book online says Kraft conducted an experiment ahead of National Lover's Day on Sunday. They found that people, who mentioned ''mayonnaise'' on their online dating profile got 74% more matches than those who didn't. Mayo lovers also received a 16% increase in first messages. The company says, ''Not only did we enjoy conducting this hilarious and light-hearted social experiment, but we loved that the results proved our hypothesis. We hope our mayo fans love the campaign as much as we do!"