The smile that stays with you

At the end of what feels like the longest week, I am finally back in Glasgow, feeling rough and just about to spend a Friday night sans humour when I spot this new ad by Durex.

I have no idea why I think it's so brilliant. I really, really don't, and the more I think about it the more it dawns on me there's no reason anyone would find it funny. But it's made my week.