Gender binary Gender identity Men who have sex with men Sexual identity Sexual orientation Women who have sex with women. Retrieved 21 December Supporting an anatomical relationship between the clitoris and vagina is a study published in , which investigated the size of the clitoris; Australian urologist Helen O'Connell, described as having initiated discourse among mainstream medical professionals to refocus on and redefine the clitoris, noted a direct relationship between the legs or roots of the clitoris and the erectile tissue of the clitoral bulbs and corpora, and the distal urethra and vagina while using magnetic resonance imaging MRI technology. While in Constantine 's treatise Liber de coitu , the clitoris is referred to a few times, Magnus gave an equal amount of attention to male and female organs. Assessment and management of penile curvature is done after artificial erection of the penis. Archived from the original on 15 February Due to the glans's high sensitivity, direct stimulation to it is not always pleasurable; instead, direct stimulation to the hood or the areas near the glans are often more pleasurable, with the majority of women preferring to use the hood to stimulate the glans, or to have the glans rolled between the lips of the labia, for indirect touch.