When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
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One in five long-term love relationships began with one or both partners being involved with others.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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Raj from the Big Bang Theory is married to Miss India.
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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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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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