Courtesy of the YouTube page:
Spies Travel is joining forces with wannabe grandmas in the fight against Denmark's low birth rate. Introducing Spies Parent Purchase™: Send your child on an active holiday and get a grandchild.
Okay now THAT is pretty funny, and a not a little risque.
And the really inspired part is that it would also probably work.
A vacation where you are encouraged to have as much sex as possible. Don't know how you turn something like that down.