I don't expect women to give me a 'courtesy rejection email.' In fact, most women I've met from online sites tell me that they receive 'hundreds of emails' from men each week. Obviously, if "I'm attracted to them" then it stands to reason that many other guys are too. You have to email 'many different women' to get one response, and you have to send messages that don't sound generic, that are respectful to even get 'one response.'