Bück Dich (Bend You) is a song by the German industrial metal band Rammstein, which first appears on their second full-length album, Sehnsucht. This song is best known for it's live performance. When perfoming it live, vocalist Till Lindemann has simulated sodomy with keyboardist Christian "Flake" Lorenz using a dildo. This performance is controversial, and once led to Lindemann and Lorenz being arrested after a concert in Massachuchets. As well, because of it, two versions of Rammstein's Live Aus Berlin DVD were made--one with Bück Dich and one without it.