Georgiadis, Janniko R., Rudie Kortekaas, Rutger Kuipers, Arie Nieuwenburg, Jan Pruim, A. A. T. Simone Reinders, and Gert Holstege. «Regional Cerebral Blood Flow Changes Associated with Clitorally Induced Orgasm in Healthy Women». European Journal of Neuroscience 24, no. 11 (2006): 3305–3316.

Holstege, G., J. R. Georgiadis, A. M. Paans, L. C. Meiners, F. H. van der Graaf, and A. A. Reinders. «Brain Activation During Human Male Ejaculation». Journal of Neuroscience 23, no. 27 (2003): 9185–9193.

Huynh, Hieu Kim, Antoon T. M. Willemsen, and Gert Holstege. «Female Orgasm but Not Male Ejaculation Activates the Pituitary. A Pet-Neuro-Imaging Study». 76, no. 0 (2013): 178–182.

Kent, William. «Why You Should Keep Your Socks on in Bed». Elite Daily, http://elitedaily.com/dating/sex/wearing-socks-30-orgasm/.

Bohlen, J. G., J. P. Held, M. O. Sanderson, and R. P. Patterson. «Heart Rate, Rate-Pressure Product, and Oxygen Uptake During Four Sexual Activities». Arch Archives of Internal Medicine 144, no. 9 (1984): 1745–1748.

Chen, X., Q. Zhang, and X. Tan. «Cardiovascular Effects of Sexual Activity». Indian Journal of Medical Research 130, no. 6 (2009): 681–688.

Levine, G. N., E. E. Steinke, F. G. Bakaeen, B. Bozkurt, M. D. Cheitlin, J. B. Conti, E. Foster, T. Jaarsma, R. A. Kloner, R. A. Lange, S. T. Lindau, B. J. Maron, D. K. Moser, E. M. Ohman, A. D. Seftel, and W. J. Stewart. «Sexual Activity and Cardiovascular Disease: A Scientific Statement from the American Heart Association». Circulation 125, no. 8 (2012): 1058–1072.

Lindau, S. T., E. Abramsohn, K. Gosch, K. Wroblewski, E. S. Spatz, P. S. Chan, J. Spertus, and H. M. Krumholz. «Patterns and Loss of Sexual Activity in the Year Following Hospitalization for Acute Myocardial Infarction (a United States National Multisite Observational Study)». American Journal of Cardiology 109, no. 10 (2012): 1439–1444.

Organization, World Health. «What Is Moderate-Intensity and Vigorous-Intensity Physical Activity?»

http://www.who.int/dietphysicalactivity/physical_activity_intensity/en/.

Waldinger, M. D., P. Quinn, M. Dilleen, R. Mundayat, D. H. Schweitzer, and M. Boolell. «A Multinational Population Survey of Intravaginal Ejaculation Latency Time». Journal of Sexual Medicine 2, no. 4 (2005): 492–497.

Anderson, W. R., D. J. Summerton, D. M. Sharma, and S. A. Holmes. «The Urologist’s Guide to Genital Piercing». BJU International 91, no. 3 (2003): 245–251.

Buhrich, Neil. «The Association of Erotic Piercing with Homosexuality, Sadomasochism, Bondage, Fetishism, and Tattoos». Archives of Sexual Behavior 12, no. 2 (1983): 167–171.

Catania, Lucrezia, Omar Abdulcadir, Vincenzo Puppo, Jole Baldaro Verde, Jasmine Abdulcadir, and Dalmar Abdulcadir. «Pleasure and Orgasm in Women with Female Genital Mutilation/ Cutting (Fgm/C)». Journal of Sexual Medicine 4, no. 6 (2007): 1666–1678.

Miller, Leslie, and Monica Edenholm. «Genital Piercing to Enhance Sexual Satisfaction». Obstetrics & Gynecology 93, no. 5, Part 2 (1999): 837.

Millner, V. S., B. H. Eichold, 2nd, T. H. Sharpe, and S. C. Lynn, Jr. «First Glimpse of the Functional Benefits of Clitoral Hood Piercings». American Journal of Obstet Gynecol 193, no. 3 Pt 1 (2005): 675–676.

Skegg, K., S. Nada-Raja, C. Paul, and D. C. Skegg. «Body Piercing, Personality, and Sexual Behavior». Archives of Sexual Behavior 36, no. 1 (2007): 47–54.

Young, C., M. L. Armstrong, A. E. Roberts, I. Mello, and E. Angel. «A Triad of Evidence for Care of Women with Genital Piercings». Journal of the American Academy of Nurse Practitioners 22, no. 2 (2010): 70–80.

Davey Smith, G., S. Frankel, and J. Yarnell. «Sex and Death: Are They Related? Findings from the Caerphilly Cohort Study». BMJ (Clinical Research Ed.) 315, no. 7123 (1997): 1641–1644.

Lindau, S. T., E. Abramsohn, K. Gosch, K. Wroblewski, E. S. Spatz, P. S. Chan, J. Spertus, and H. M. Krumholz. «Patterns and Loss of Sexual Activity in the Year Following Hospitalization for Acute Myocardial Infarction (a United States National Multisite Observational Study)». American Journal of Cardiology 109, no. 10 (2012): 1439–1444.

Onder, G., B. W. Penninx, J. M. Guralnik, H. Jones, L. P. Fried, M. Pahor, and J. D. Williamson. «Sexual Satisfaction and Risk of Disability in Older Women». Journal of Clinical Psychiatry 64, no. 10 (2003): 1177–1182.

Palmore, E. B. «Predictors of the Longevity Difference: A 25-Year Follow-Up». Gerontologist 22, no. 6 (1982): 513–518.

Levin, Roy, and Cindy Meston. «Nipple/Breast Stimulation and Sexual Arousal in Young Men and Women». Journal of Sexual Medicine 3, no. 3 (2006): 450–454.

Wiseman, Bryony S., and Zena Werb. «Stromal Effects on Mammary Gland Development and Breast Cancer». Science 296, no. 5570 (2002): 1046–1049.

Molloy, H. F., E. LaMont-Gregory, C. Idzikowski, and T. J. Ryan. «Overheating in Bed as an Important Factor in Many Common Dermatoses». International Journal of Dermatology 32, no. 9 (1993): 668–672.

News, ABC. «The American Sex Survey: A Peek beneath the Sheets». 2004.

Wire, PR News. «National Sleep Survey Pulls Back the Covers on How We Dose and Dream». PR Newswire Association, http://www.prnewswire.com/news-releases/national-sleep-survey-pulls-back-the-covers-on-how-we-doze-and-dream-184798691.html.

Barrientos, Jaime E., and Dario Páez. «Psychosocial Variables of Sexual Satisfaction in Chile». Journal of Sex & Marital Therapy 32, no. 5 (2006): 351–368.

Blanchflower, DG, and AJ Oswald. «Money, Sex, and Happiness: An Empirical Study». Scandinavian Journal of Economics 106, no. 3 (2004): 393–415.

Hawton, K., D. Gath, and A. Day. «Sexual Function in a Community Sample of Middle-Aged Women with Partners: Effects of Age, Marital, Socioeconomic, Psychiatric, Gynecological, and Menopausal Factors». Archives of Sexual Behavior 23, no. 4 (1994): 375–395.

Nettle, D., and T. V. Pollet. «Natural Selection on Male Wealth in Humans». American Naturalist 172, no. 5 (2008): 658–666.

Pollet, Thomas V., and Daniel Nettle. «Partner Wealth Predicts Self-Reported Orgasm Frequency in a Sample of Chinese Women». Evolution and Human Behavior 30, no. 2 (2009): 146–151.