http://www.theregister.co.uk/2005/06/20/o_research/
How can women ever say men are just heartless and stuff when they just god damn switch off when you give them an orgasm As for the bit about the brain not shutting down the area that covers fear in men, that's probably just in case the condom breaks or somethingReuters reports that the researchers told a fertility conference today that when the women were experiencing a genuine humdinger of an orgasm, areas of the brain governing fear and emotion were deactivated, as was the cortex, which governs emotion. However, when the women faked orgasm, those areas stayed alert.
The results for men were less conclusive, with those areas linked to emotion and fear showing less de-activation during orgasm, while other areas showed more stimulation.