Hunting for domains that you can use for your new porn sites can take up a lot of your time. Even when you find one, it's probably been out of the zone for a couple of months, and it could have lost all it's ranking and inbound links. Added to that, you've got to wait to get out of the search engine sandbox. You can avoid all that by buying a pre-registered name that's listed on the "Domains for Porn" blog.