The Swedish health authority once distributed cards at Arlanda airport that, at first glance, looked like airplane safety cards.

Looking more carefully, the headline was "Safety Abroad" instead of "Safety On Board," and the little diagrams were about how to use a condom! It was an anti-HIV card, and glued to the bottom was an actual condom in a wrapper.

I always wanted to scoop up a handful of these and replace the safety placards on some flight with them, but never had the guts. Now they are long gone, alas.