A frontal cross section illustration of the vagina showing the action of a vaginal lubricant which lubricates the entrance to the vagina and hydrates SuperStock vagina (body) NamuWiki Why Is My Vagina Dry? Vaginal Dryness Causes, Diagnosis And Treatment A Guide to Understanding Natural Vaginal Lubrication O Positiv . . . Genital arousal involves vasocongestion and other physiological changes that occur in response to sexual stimuli Subjective arousal refers to mental engagement during sexual activity.