A British couple adopted a German baby. They raised him for years, however he never spoke, so they believed that he was mentally handicapped, going as far as to take him to therapy, which was fruitless. Then, when the child was 6 years old, his parents made him Apfelstrudel, and he suddenly said: "It is a little tepid."
His parents, of course shocked that he was suddenly speaking, asked: "Wolfgang, why have you never spoken before?", to which the child replied: "Up until now, everything had been satisfactory."