Trial Offer: Rent up to adult three DVDs free for 14 days when you join the PostaDVD rental club. The club carries both 18 (softcore) and R18 (hardcore) films. Monthly fee: £9.75 to have one DVD or game out at a time, £11.75 for up to two, or £13.75 for three, £16.75 for four or £19.75 for five. Relative size of selection: 3 of 4 stars. DVDs ship from: Watford. Shipping costs: Included (site provides pre-paid mailers to return DVDs). Credit cards accepted: Visa, Mastercard, JCB, Delta, Solo, Switch. Customer service: 020 8 499 8903 or email. Open to: Residents of the U.K. and Ireland.

Adult DVD Rental Trial Offer: Take your first month for £4.99 when you join the DVD Monthly adult DVD rental club, which carries R18 films. Then pay £14.99 per month to have one DVD out at a time, £19.99 for up to two or £24.99 for up to three. The club is open to U.K. residents but also ships to Europe.

Download R18 Movies Instead of Renting: If you prefer to watch movies on your computer rather than waiting for a DVD to arrive by mail, visit Adult VOD Pod to compare R18 download and streaming video-on-demand services. Purchase credits to view DVD-quality adult movies online or play a flat fee (typically U.S. $4.95 to $14.95) to download movies that can be viewed for a set period of time (e.g., 24 hours, a week, 30 days). Some sites, such as VideosZ, charge U.S. $29.95 per month for unlimited downloads. Others, such as Hot Movies, sell access by the minute or per download.

Adult Video Guide: Browse sex bestsellers at Amazon UK, which offers free shipping on £15+ orders. It also sells The Adult Video News Guide to the 500 Greatest Adult Videos of All Time.