I'm currently running an adult oriented website which has a age verification page (validuser.php) at the start to verify the users age before giving access to content. Right now it's a cookie-based script but I'm running into problems with making my site fully crawlable. I went to create a sitemap and only the validuser.php is indexed because in order to get access to the rest of the site you must have the certain age verified cookie. Is there a way to solve this problem so my site is transparent to search engines but still requires the age verification for regular users? Thanks!