Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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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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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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Speed dating was invented by a Rabbi in 1999.
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One in five long-term love relationships began with one or both partners being involved with others.
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Parents receive 1 out of every 5 Valentines.
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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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