Trial offer: Get a three-day trial membership for $4.87. Rental fees: Unless you cancel, the trial converts to a recurring monthly membership at $39.73 per month. Alternatively, you can pay by the minute without becoming a member through its partner site, Adult Rental VOD. Relative size of selection: 2 of 4 stars. Technical requirements: PC or Mac with Windows Media Player, Quicktime or RealPlayer and a broadband Internet connection. Many of the site's movies require Netscape browser to view (i.e., not AOL or Internet Explorer). America Online users must use AOL Version 3.0 or greater and Netscape 3.0 or greater. Credit cards accepted: Visa, Mastercard (via iBill or Paycom). Privacy policy: Does not share customer information with third parties. Customer service: Email.

Best Adult VOD Site?: The most popular VOD service in our guide is Hot Movies, which has tens of thousands of adult titles. You can buy access by the minute (at 8 cents and up) or purchase unlimited viewing of any individual title for two, seven or 30 days. Our most popular flat-rate site is Video Box, which charges $9.95 per month for unlimited downloads from its library of more than 3,000 movies.

Prefer to Rent DVDs?: If you prefer to rent DVDs rather than download movies, compare online services at our Adult DVD Rental Guide. Most charge $10 to $30 per month to have one to three adult DVDs out at a time, with no late fees or return dates. A few rent individual DVDs for $3 to $5 each per week. A credit card is required to join any DVD rental service.

Discount Adult DVDs: If you're looking for bargains and selection, we suggest Movies by Mail, which offers new customers a free movie when you pay $4.95 shipping, as well as discount codes (see site), XRent DVD, which sells ex-rental titles from $4.50 each or Overstock DVD and Adult DVD Empire, each of which have many clearance titles and offer free shipping on every order.

Video Gold Adult DVD Club: Choose two adult DVDs for $5.95 each plus shipping when you join the Video Gold Adult DVD Club from Adam & Eve. You'll also be able to choose a third adult DVD free. As a member, you must purchase two more DVDs at regular club prices within a year. Or purchase a fourth DVD when you sign up for $19.95 and buy just one additional DVD within a year. Open to: Residents of the U.S. and Canada.

Search for Sex Books: Browse the list of sex book bestsellers at Amazon.com, including The Adult Video News Guide to the 500 Greatest Adult Videos of All Time.