Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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Historically, sweat has been an active ingredient in perfume and love potions.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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