Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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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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A zoo in China gave a gay penguin couple the opportunity to raise a chick.
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A puppy is born blind, deaf, and toothless.
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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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