Kammerer-Doak, Dorothy; Rogers, Rebecca G. (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. PMID18486835. ციტატა: „Most women report the inability to achieve orgasm with vaginal intercourse and require direct clitoral stimulation ... About 20% have coital climaxes...“
Kammerer-Doak, Dorothy; Rogers, Rebecca G. (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. PMID18486835. ციტატა: „Most women report the inability to achieve orgasm with vaginal intercourse and require direct clitoral stimulation ... About 20% have coital climaxes...“
Kammerer-Doak, Dorothy; Rogers, Rebecca G. (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. PMID18486835. ციტატა: „Most women report the inability to achieve orgasm with vaginal intercourse and require direct clitoral stimulation ... About 20% have coital climaxes...“