There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
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Women rate men more attractive if other women are looking and smiling at him.
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Historically, sweat has been an active ingredient in perfume and love potions.
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Wearing red increases attraction.
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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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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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