Historically, sweat has been an active ingredient in perfume and love potions.
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40% of people who are rejected in romantic love slip into clinical depression.
72
One in five long-term love relationships began with one or both partners being involved with others.
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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 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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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Men who kiss their wives in the morning live five years longer than those who don't.
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