Ask the Naked Scientists Why does sex make you sleepy?
Aug 29, 2025
Curious about the mysteries of sleep? Discover why sex can make you drowsy, exploring its physiological and evolutionary roots. Ever wondered why half-filled ice trays freeze faster? Unpack that quirky science alongside the strange sensations of scratching itches and what makes nicotine addictive. Plus, dive into the biology of blood types and unravel the myths surrounding statins for heart health. There's even a peek at Earth's magnetic shifts and why we only see one side of the moon!
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Earth's Magnetic Field Is Dynamic
- Earth's magnetic field is generated by a molten, spinning iron core that can change and even invert over geological time.
- Magnetic reversals have occurred repeatedly and life has persisted through them.
Why Refrozen Ice Easier To Pop Out
- Ice that partially melted and refroze may not conform tightly to tray contours and thus is easier to dislodge.
- Reduced contact area explains why refilled half-melted cubes pop out more readily.
Sex Often Triggers Sleep For A Reason
- Sex commonly induces sleepiness due to physical exertion and evolutionary reasons favoring post-coital rest.
- Post-sex sleep may increase chances of successful conception by keeping partners still and rested.
