Spider venom comes in many forms. It can often take a long while to discover the full effects of the bite. Naturalists have pondered this for years: there are spiders whose bite can cause the place bitten to rot and to die, sometimes more than a year after it was bitten. As to why spiders do this, the answer is simple. It's because spiders think this is funny, and they don't want you ever to forget them.
Neil GaimanHe was having more fun than a barrelful of monkeys.* *Several years earlier Spider had actually been tremendously disappointed by a barrelful of monkeys. It had done nothing he had considered particularly entertaining, apart from emit interesting noises, and eventually, once the noises had stopped and the monkeys were no longer doing anything at all—except possibly on an organic level—had needed to be disposed of in the dead of night.
Neil GaimanSoon enough his head would be swimming with tales of derring-do and high adventure, tales of beautiful maidens kissed, of evildoers shot with pistols or fought with swords, of bags of gold, of diamonds as big as the tip of your thumb, of lost cities and of vast mountains, of steam-trains and clipper ships, of pampas, oceans, deserts, tundra.
Neil Gaiman