Kurt (Felix Rakosi, 12) and his older female cousin strip and show each other "everything". Then the father of the girl walks in and starts hitting both of them, especially his daughter.
Dieter (Dieter Hallervorden Jr., 5) is undressed by his dad and runs around nude when he's trying to avoid getting a shower. He ends up standing in the bath being washed. This is all part ot the title sequence.