monogamy, n.Trivia

STDs might have driven ancient humans to monogamy from polygamy

Gentoo penguins have one mate throughout their entire life. Sometimes they "propose" by giving their mate a pebble.

Seahorses are monogamous and mate for life. They hold each other's tails when they travel, so they don't drift apart.

Puffins are exceptionally monogamous for the animal world. They rarely change mates, and couples typically return to the same nesting place year after year.