The tragic life of Norbert

Norbert was the most unfortunate of all souls for his personality. All who knew him would confirm he fully lived up to his nerdy name. Whilst there are people whose weakness and feebleness give others a need to protect them, he was the opposite. Norbert really was just the sort of a weakling that irritates you to the point where you wish to just punish him for existing in the first place. For his credit, he was able to survive his first 20 years. Unable to socialize, he had been the butt of his classmates. Unable to study, he had been loathed by all the teachers. Unable to take care of himself, he had progressively irritated his family. Interestingly enough, none of these factors brought his life to an end.
It was an ordinary day, a lovely afternoon and Norbert was walking home from the comics-store, since his only true passion were the childish Disney books. Over a fence, two big dogs were barking at him in their usual manner. Delighted by the fair weather, Norbert whistled to them as he walked by, as a friendly gesture. But the dogs jumped over the fence and attacked him with such ferocity that they killed poor Norbert.
In the days that followed, the only logical explanation that people could come up with was that Norbert's whistling had been so extraordinarily pathetic that the dogs simply couldn't hold in their rage and jumped on him as if he was a little rabbit.