The Web server has NO IDEA what it is connected to! It could very well be that the client making the HTTP request is actually a Web "spider" that is just searching or indexing sites. The HTTP protocol is very simple: "Give me back the contents of this page."
With ASP, you can make the contents of a Web page dynamic (e.g., depend on a database or user form input or or or), but you can STILL only "give back the contents of this page." Period.
But you can NEVER change WHERE the output from RESPONSE goes to. Understand, RESPONSE is actually sending data to the Web server and the Web server then sends the info on to the client. So ASP can only do what the Web server can do. Period.