max. b. Many women (70–80%) require manual clitoral stimulation...↑ Mah K, Binik YM (January 7, 2001). "The nature of human orgasm: a critical review of major trends". Clinical Psychology Review. 21 (6): 823–856. doi:10.1016/S0272-7358(00)00069-6. PMID 11497209. Women rated clitoral stimulation as at least somewhat more important than vaginal stimulation in achieving orgasm; only about 20% indicated that they did not require additional clitoral stimulation during intercourse.↑ Kammerer-Doak D, Rogers RG (June 2008). "Female Sexual Function and Dysfunction". Obstetrics and Gynecology Clinics of North America. 35 (2): 169–183. doi:10.1016/j.ogc.2008.03.006. PMID 18486835. Most women report the inability to achieve orgasm with vaginal intercourse and require direct clitoral stimulation ... About 20% have coital climaxes...↑ Elisabeth Anne Lloyd (2005). The case of the female orgasm: bias in the science of evolution. Harvard University Press. p. 53. ISBN 978-0-674-01706-1. සම්ප්‍රවේශ