When dragonflies mate, their tails form a love heart.
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The desire to squeeze and hug cute things comes from the same place in your brain as aggression.
65
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
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.
25