Master in Sexology and Psychosexual Counseling. For More Info WhatsApp- 9604715783. Women: vaginal lubrication within 10 to 30 seconds. The lubrication occurs with equal promptness whether the stimulus is direct to genital region or to her breasts or an erotic train of thoughts. Source of vaginal lubrication is the sweating reaction occurring on the walls of vagina. It seeps out of congested blood vessels.