A man's beard grows fastest when he anticipates sex.
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Men who kiss their wives in the morning live five years longer than those who don't.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
Kissing an infection-free partner is good for your teeth!
141