A pop up store by Danish chocolate brand Anthon Berg and agency Robert/Boisen & Like Minded didn't take credit cards, cash or checks. Instead, you had to pay for your sweeties with the promise of "good deeds."
Payment options included "serve breakfast in bed to your loved one" to "don't comment on your girlfriend's driving for a week." The most popular one was "Help clean your friend's house," while few agreed to go for a week without lying to their fathers.
Using iPads as cash registers, the promise of the good deed was posted on the Facebook pages of both the giver and the receiver.