When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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You burn 26 calories in a one minute kiss.
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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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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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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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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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