The Japanese Tree frog

The human body produces a hormone called oxytocin, which is associated with trust, empathy, lust, and relationship building.
But frogs don’t have that.
Instead, they have their own hormone called mesotocin.
This does the same thing as oxytocin and drives frogs to look for a mate, or for some, look for their young.
Just like oxytocin in us humans, mesotocin helps frogs to feel content and not be stressed!