Just read a great article on brain activity during sexual stimulation and specifically upon orgasm: scanning people’s brains while they’re engaged in sexual activity with their partners has lead to some fascinating results. From the article:
In men, greater activity was seen in the insula, which deals with emotion, and particularly in the secondary somatosensory cortex, which rates the significance of physical sensations. This suggests that the sensory input coming from the genitals is being judged highly important and pleasurable by the brain.
Women, however, show very little increased brain activity, and only in the primary somatosensory cortex – which registers purely that a sensation in the genitals is there.”In women the primary feeling is there, but not the marker that this is seen as a big deal,” Dr Holstege said.”For males, touch itself is all-important. For females, it is not so important.”
I fascination turned to amusement when I read about some of the difficulties the participants had under experimental conditions, though:
The experiments also revealed a rather surprising effect: both men and women found it easier to have an orgasm when they kept their socks on. Draughts in the scanning room left couples complaining of “literally cold feet”, and providing a pair of socks allowed 80 per cent rather than 50 per cent to reach a climax while their brains were scanned.