Via TPM, who first reported on the story:
Bradlee "Dean’s band — Junkyard Prophet, a Christian heavy metal/rap group — performed at Dunkerton High School on Thursday and then split the audience up into several groups: boys, girls and teachers. They reportedly told the girls that they would have mud on their wedding dresses if they weren’t virgins, advised them to take a submissive role in their marriages and showed images of aborted fetuses. Those at the school who walked out on the program were mocked and shouted down, the WCF Courier reports."
(h/t The Blaze)