pp. 541–543. ISBN 978-1-4129-5846-2.↑ Dixson A.F. (2012) Primate sexuality: Comparative studies of the Prosimians, Monkeys, Apes, and Human Beings. Oxford University Press, 2nd edition.↑ Doty R.L. (2014) Human Pheromones: Do They Exist? in Mucignat-Caretta C. (Ed). Neurobiology of Chemical Communication. Boca Raton (FL): CRC Press, (19).↑ 22.0 22.1 22.2 Kahn AP, Fawcett J (2008). The Encyclopedia of Mental Health. Infobase Publishing. p. 111. ISBN 978-0-8160-6454-0.↑ Cecie Starr; Beverly McMillan (2008). Human Biology. Cengage Learning. p. 314. ISBN 978-0495561811. සම්ප්‍රවේශය April 30, 2013.↑ Joseph A. Flaherty; John Marcell Davis; Philip G. Janicak (1993). Psychiatry: Diagnosis & therapy. A Lange clinical manual. Appleton & Lange (Original from Northwestern University). pp. 544 pages. ISBN 978-0-8385-1267-8. The amount of time of sexual arousal needed to reach orgasm is variable — and usually much longer — in women than in men; thus, only 20–30% of women attain a coital cli