↑ Morin, Jack (1998). “What is Anal Intercourse”. Anal Pleasure & Health: A Guide for Men and Women (ấn bản 3). San Francisco, Califonina: Down There Press. tr. 151. ISBN0-940208-20-2. Ever since the invention of the strap-on dildo, anyone can enjoy intercourse as the inserter, the receiver, or both. Strap-on harnesses are made of leather or fabric. The most common designs have an adjustable strap for the waist plus two others for the legs. In the front, a ring holds a dildo with a flared base securely against or slightly above the genitals.
1 2 Blue, Violet (2007). “Harnesses and Dildos”. The Adventurous Couple's Guide to Strap-On Sex (ấn bản 1). San Francisco, California: Cleis Press. tr. 93. ISBN978-1-57344-278-7. You'll find that harnesses come in a wide variety of shapes, styles and sizes and can be tailored to fit virtually any fantasy scenario you and your lover have in mind. Strap-ons are for women, men and transpeople of all genders and orientations who want a little (or a big) something extra in their pants.
↑ Strong, Bill; Gammon, Lori (2006). “Strap-on Tools”. Anal Sex for Couples. West Palm Beach, Florida: Triad Press. tr. 131–142. ISBN0-9650716-2-6.
↑ Taormino, Tristan (2006). “Strap-on Dildos and Harnesses”. The Ultimate Guide to Anal Sex for Women (ấn bản 2). San Francisco, California: Cleis Press. tr. 74–77. ISBN1-57344-221-6.
