Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Women who are romance novel readers are reported to make love 74% more often with their partners than women who do not read romance novels.
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Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
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Women who play video games tend to have more sex and be happier with their relationships than those who don’t.
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A person swallows approximately 295 times while eating dinner.
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The “cheerleader effect”, the theory that girls look more attractive in groups, is scientifically proven.
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A chance of a woman having twins is increased after the age of 35. About 1 in 27 women will give birth to twins after this age. After 50 the chances of having twins is 1 in 9.
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Intelligent people have more zinc and copper in their hair.
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