Much is written about the world's rapidly ageing population. The advances in medical science that have helped us to live longer are legion and manifold. But leaving aside the usual concerns about more people living for longer in a world of limited resources, a hitherto unforseen issue has arisen - and I doubt it's something Age Concern saw coming.

No doubt thanks to one particular medical discovery that comes in the shape of a little blue pill, we now have a rapidly ageing population that is best described as feeling frisky.

Yes, it turns out the oldies are at it to such an extent that STI rates are on the rise. An organisation called Safe Sex For Seniors has released a film to raise awareness of the issue that is funny and frightening in equal measure. You can thank BBH for this.

This is safe to watch at work, but still wrong on a number of levels. You have been warned.