Marco Reus recently signed a contract extension with Borussia Dortmund despite the club’s struggles this season and serious interest from bigger clubs abroad. Now we know why: because he doesn’t want to have to learn a whole new set of secret handshakes with new teammates somewhere else.

Following Dortmund’s win against Mainz, Reus carried out a series of handshakes and embraces that seemed to be specific to certain teammates (Pierre-Emerick Aubameyang, Ilkay Gundogan, and Nuri Sahin). The smoothness and ease with which Reus carried out this ritual must have taken some practice, so the thought of starting over with other players who might not be as adept in the secret handshake game must have been upsetting.