THAT'S A THEM PROBLEM:

Researchers from the French government took scans of men's brains during and after sex to monitor changes in their mental activity.

They found that the cerebral cortex, which governs conscious thought, switched off during orgasm.

Two other areas, the cingulate cortex and the amygdala, then sent a message to the rest of the brain telling it to remove all sexual desire, via the release of sleep-inducing chemicals including serotonin and opioids.

The findings may provide men with a helpful excuse to turn off the light and go to sleep, but they are unlikely to be welcomed by their partners who do not experience the same effect.

Follow @brothersjudd