There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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Historically, sweat has been an active ingredient in perfume and love potions.
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You burn 26 calories in a one minute kiss.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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