Rental fees: $9.95 per month (recurring) for unlimited access to all titles, $17.95 per month for unlimited access with DVD resolution (recurring) or $9.95 per month (non-recurring) for unlimited access with DVD resolution when you prepay for 10 months. You can stream the videos or download them, with no speed or bandwidth limits. You also can choose the start and stop frame within any movie to create your own favorite scenes. Relative size of selection: 3 of 4 stars. Video Box adds titles daily. Technical requirements: PC with Windows 98 or better and Windows Media Player 9 or better, a broadband Internet connection and Internet Explorer 5.5 or higher. Credit cards accepted: Visa, Mastercard, Discover (billed as Paycom.net, Meta Inter or CCBill). Privacy policy: Not posted. Customer service: Email via site.

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, Overstock DVD, which offers clearance titles and free shipping, or Wanted List, which offers 10 percent off any $25+ purchase with the code ADULTDVD10%OFF or free shipping with 5PORNSHIP.

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.