At least, that's one of the plausible conclusions of a new study led by Dr. While the study itself may not be quite as engaging as "50 Shades of Grey," it points out that your pillow talk doesn't have to be, either. That's because after an orgasm, men tend to experience decreased activity in the prefrontal cortex -- the region of the brain most commonly associated with processing a variety of different information streams and responding appropriately. Immediately following this reaction, two other brain areas the cingulate cortex and amygdala direct him to disengage from sexual thoughts.
Sleep vs. cuddling: Study looks at what happens after sex -- ScienceDaily
Christopher Winter, M. Prolactin suppresses dopamine—a stimulating neurotransmitter that makes you feel awake, he explains. And your body releases it in spades when you come. When that happens, the hormone melatonin ignites your sleep cycle.
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Scientists explained yesterday exactly why it is that men have a tendency to nod off after making love. Apparently, it's nothing to do with wanting to avoid a cosy chat with their partner. According to the scientists, they are simply tired out. Eighty per cent of men said they felt more relaxed and were able to drift off without any problems after making love, compared with 46 per cent of women.