Join the news democracyWhere your votes decide the Top 100
Couple Tom and Libby are trying to raise money for charity ahead of attempting the Mongol Rally, a 10,000-mile unassisted drive to Mongolia.
In order to drum up support they've set up a Facebook page filled with their attempts at pranking each other and generally being silly in the name of charity.
The latest video has gone, as the kids say, viral for the way in which a seemingly simple riddle somehow befuddles Libby... much to Tom's delight.
Watch below and repeat after us Y-E-S.
I actually can't believe my girlfriend fell for this!Posted by Him and Her - Mongol Rally 2016 on Thursday, 10 September 2015
I actually can't believe my girlfriend fell for this!
HT Him and Her - Mongol Rally Facebook page