And that is why Van Doorn has come up with this action in collaboration with the Zaadbalkanker Foundation. So that more men realize that they need to feel their balls every now and then. In the playful campaign video that accompanies the action, presenter Philip Freriks, known from De Slimste Mens and the NOS news, explains how to do that: “You check each ball separately. With one hand you grab the ball, the other look for lumps, hardness, and changes. If you feel anything crazy, get yourself checked out by a doctor,” he says.