i was just searching google to see how many of my urls are listed and it looks like all of them are right now but my question is do i need to send my freebie sites to places like gaydemon and manpics2000 for them to be listed in the search engine?

i see some sites are listed that do not have back links to these places and it makes me wonder if google will find the sites on my homepage on its own or if by sending them for listing on these other sites it will be better for me.