The testicles are the male gonads where sperm and male hormones are produced. The breasts are external organs used for sexual pleasure in some cultures. For example, the increased hypothalamic activation observed in men could be due to the fact that men can obtain erections and this alters hypothalamic activity. There was a new focus on the purpose of marriage; it was increasing regarded as being for love rather than only for economics and reproduction. Automatic processes and the appraisal of sexual stimuli. Various researchers dispute its structure or existence, or regard it as an extension of the clitoris.
In some religions, sexual behavior is regarded as primarily spiritual.
Sex differences in visual attention to erotic and non-erotic stimuli. The testicles are held by the spermatic cord, which is a tubelike structure containing blood vessels, nerves, the vas deferens, and a muscle that helps to raise and lower the testicles in response to temperature changes and sexual arousal, in which the testicles are drawn closer to the body. Creating Physical and Emotional Health and Healing. Two of these bodies lie side-by-side in the upper portion of the penis called corpora cavernosa. The second phase, called the plateau phase, is characterized primarily by the intensification of the changes begun during the excitement phase. The Continuum Publishing Company. Journal of Marriage and Family.