When dragonflies mate, their tails form a love heart.
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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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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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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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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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The left ear is more responsive to words of love and emotion whispered into it than the right.
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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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