When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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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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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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Yawns are more contagious among people with closer relationships.
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