New information on human orgasm by using PET-scans (by Prof. Holstege of the University og Groningen. BRAIN DURING PEAK PERFORMANCE Studies about sex and the brain also attracted a good deal of attention. A team of Dutch researchers, for instance, offered some novel findings about what happens, beyond the obvious, during the male orgasm. They recruited 11 heterosexual couples to do what comes naturally, except this time with the man's skull immobilized in a positron emission tomography (PET) scanning machine. http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2002/11/18/MN212373.DTL http://health.groups.yahoo.com/group/mind-l/message/24770 http://www.sensualism.com/sex/orgasm.html pdf file with brainscan photo's: http://biology.uky.edu/Cooper/Class PDFs/Bio350Fall/maleBrain.pdf Dutch article of University of Groningen: http://www.rug.nl/med/nieuws/polsslag/ps20orgasme. I am sure Dutch speaking Monique is able to give a very efficient summary of it. Of course there was on PF already a thread on orgasm ( https://www.physicsforums.com/showthread.php?s=&threadid=448&highlight=orgasm ) but this new information seems very important to me.