携手揽腕入罗苇，含羞带笑把灯吹。

金针刺破桃花蕊，不敢高声暗皱眉。

最近热门美剧——“性爱大师”也是根据两大性研究学者的真实故事作为背景，讲述两位性教育研究专家主人公威廉· 马斯特斯医生和他的助手弗吉妮娅·约翰逊不惜一切地发起一场性爱革命的故事。他们坚持自己的信念， 不理会世人封建的眼光、无惧怕身败名裂的风险，从事性学研究。请不要把“性”低俗化。

Three views of the paracentral lobule, showing its relation to adjacent cortical regions （adapted from）. The relation of the paracentral lobule to the sensory cortical homunculus of Penfield and Rasmussen is shown by the lines connecting the corresponding regions.

Three-axis (columns: coronal, sagittal and transaxial) views of the group-based responses to experimenter-applied (finger and toe) or participant self-applied (clitoris, vagina, or cervix) stimulation in relation to the homuncular map (adapted) generated by Penfield and Rasmussen. The arrows indicate the sensory cortical regions activated by the various stimulated body regions. Finger stimulation activated the postcentral (sensory) gyrus. Hallux (large toe) stimulation activated the medial paracentral lobule. Clitoral, vaginal, cervical, and nipple self-stimulation also activated the medial paracentral lobule. Note that the perineal (groin) region just lateral to the midline in the paracentral lobule was also activated by clitoral, vaginal, and cervical self-stimulation. There was marked hand-related activation in the postcentral gyrus, and continuation of activation into the supplementary motor area immediately rostral to the sensory cortical responses, in the self-stimulation conditions. The secondary sensory cortex (SII; at the base of the homunculus) was activated under all the stimulus conditions (not evident in these images in the thumb stimulation condition). The “hot-metal” calibrations show the range of Z-scores for the intensity of the fMRI responses.

a: Group-based composite view of the clitoral, vaginal and cervical activation sites, all in the medial paracentral lobule, but regionally differentiated. We interpret this as due to the differential sensory innervation of these genital structures, i.e., clitoris: pudendal nerve, vagina: pelvic nerve, and cervix: hypogastric and vagus nerves .

b: Nipple self-stimulation activated not only the thoracic region, but also unexpectedly, the genital region of the medial paracentral lobule. Shown are superimposed responses to nipple and genital self-stimulation in three participants. Note the congruence between activation produced by stimulation of nipple and cervix (left panel), nipple, cervix and clitoris (center panel), and nipple, vagina, cervix and clitoris (right panel). Not unexpectedly, cervical self-stimulation activated the groin region (center panel). However, it is surprising that vaginal self-stimulation activated the thoracic nipple region (center panel), and nipple self-stimulation activated the groin sensory region (left panel). Color coding: nipple (white), cervix (yellow), clitoris (green), vagina (red, or when congruent with nipple - pink).

c: Three-axis view of the response to the nipple self-stimulation in the case of the center image of Figure 3(b) (downward pointing blue arrow).

文章：Women's clitoris, vagina and cervix mapped on the sensory cortex: fMRI evidence.