It's no secret that having kids can dampen a couple's sex life. And travel agency Spies Travel has devoted its existence to championing sex among the Danish—by getting them to take more vacations, which they claim boosts the chances of getting lucky by 102 percent.
For the third ad in the "Do It for Denmark" campaign, Spies came up with a compelling idea—a "Do It Forever" loyalty program, with a fertility bonus that gives you bigger travel discounts if you have more kids.