Most research done on sex is talking only about intercourse between partners. As it turns out, whether you have sex alone or with a partner makes a big difference to your body. When you have sex with a partner – regardless of how well you know them – your body releases oxytocin. When you're alone, it doesn't. This hormone makes us feel more bonded to the person we're with and can also act a natural sedative and increase empathy. Research also shows that intercourse is associated with many health benefits that masturbation isn't, including better erectile functioning, less body fat, and reduced blood pressure spikes in reaction to stress.
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