It all started with a problem: nobody wants to talk about prostate cancer. The solution was as simple as it was absurd – printing ‘arseholes’. As stickers. What began as a university project to raise awareness of screening first became a joke, then a fan page, then a shop, and finally an international phenomenon.

Today, Anusstickers can be found on street lamps in Berlin, in ski gondolas in Austria, on surfboards in Australia, on rubbish bins in New York and on temples in Nepal. Over 1.2 million stickers leave the warehouse every year – and every single one bears the URL anussticker.com .

What makes it special is that Anussticker has never spent a single euro on advertising. All the traffic comes from stickers being displayed in public spaces: people spot them, their curiosity is piqued, and they type in the URL. Every buyer becomes a distributor, every sticker a marketing channel. It’s a viral offline loop that works without internet marketing – and has nevertheless scaled to over 20 countries.