Apparently in Germany, kids get to plan their own senior parties. According to the Daily Mail, a stripper was brought in to the school under the guise of making a presentation on "equal rights" but obviously the kids learned about something else that day. The "speaker" came dressed in business attire and started out talking about teacher-student relationships, which she followed up by taking off that business attire and giving a few students a lap dance (as you can see in the video).
Since everyone in the room and involved was technically an adult and not underage, the teachers allowed the performance to go ahead. We imagine the school's official response to this event looked something like this: