If you want to attract bookmarkers and return visiters to your site, then the site has to be different everytime they come. You could change it manually, but a rotation script is a lot easier - (next choice would be rotating gallery URLs that many sponsors provide).
Rev Erotica
Fetish Hits
Score Cash
Diesel Cash
Webmasters Make Money
Lightspeed Cash
Kim Holland Cash
Woot Woot Cash
Virgin Movies
all do loads of pre-built teen hosted galleries. Some have rotators. For more info on them check sig.