A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
When dragonflies mate, their tails form a love heart.
22
There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
When cats are happy, they may squeeze their eyes shut.
10