日本等潤病院院長(精神性醫學)日向野春總《正常位的研究》。如女方臥姿時單腳張抬,或一腳舉高至男方脇下或肩部等。 vaginal contractions(英语:Vaginalcontraction) 比如,可換为让男方仰卧,由女人从上接合的体位。 the anterior wall of the vagina
studies. [2016-11-27]. (原始内容存档于2016-05-01). Koedt, Anne. The Myth of the Vaginal Orgasm. Chicago Women's Liberation Union. 1970 [2010-11-18]. (原始内容存档于2016-08-19)
2013: 315–7. ISBN 9780702047473. Andersson KE, Arner A. Urinary bladder contraction and relaxation: physiology and pathophysiology. Physiol. Rev. 2004-07