position is recommended when either partner has back problems; the starfish position is recommended to achieve orgasms more easily and the missionary position may be uncomfortable for the receiving partner if the weight of the inserting partner, relative to the receiving partner's, is a problem. Also, the standing positions may be unsuitable if there is a significant height difference between the participants, unless the female is being carried. References Further reading Historical Kama Sutra The Perfumed Garden Modern Gillian, Max, The Illustrated Guide to Extended Massive Orgasm. Hunter House. 1st ed., 2002. , 235 pages. Hooper, Anne J., Sexopedia. DK Publishing. 1st American ed., 2002. , 272 pages. Kemper, Alfred M., Love Couches Design Criteria. Los Angeles 1972. Library of Congress #75-36170, 101 pages—design criteria for assistive furniture, with sections on accommodation of disabled persons. McMeel, Andrews and Lisa Sussman, Sex Positions. Carlton Publishing Group. 2002. , 96 pages. Nerve.com, Position of the Day Playbook, Sex Every Day in Every Way. Chronicle Books. 2005. , 376 pages. External links * Sex positions Category:Sexology