Most European countries, notably France, are worried about their birthrates. Modern women aren't generally having enough children to replace themselves, leading to aging populations, without enough young people to support the 'wrinklies' as the Brits call their senior citizens.
But don't blame the women. I am no demographer, but a few days driving on French roads will tell you where the problem lies. Young French men aren't living long enough to reproduce because of how they ride their motorcycles.
The notorious 'lane-splitting' technique, where they simply rocket along the lane dividing line, missing car and truck mirrors by scant millimetres - well, it's a wonder any of them survive to child-generating age.
How can they be so confident that Jacques won’t nudge the steering wheel on his little Citroen van, perhaps while flicking the ash off his Gitanes, sending the hapless rider into 'mercredi prochain'?
Sad to say, we're starting to see this behaviour on this side of the pond too. Regular readers will know my stance on motorcycles - in a three-dimensional world, two wheels is at least one too few.
But if these guys - and it is almost always guys - keep riding like this, then we better be looking out for our birth rates too.