Spammers believe that every internet user is a 20-something, over-sexed, physically-under-developed, male who is happy to pump themselves full of dodgy drugs, wants a nice imitation watch, needs a "job" in "financial services" with a new logo, a web-site designed in Russia, and will send a few thousand dollars to a African who has millions just waiting to be released by the local dictator, if only he had some working capital.