It is a known fact that birds mate for life, meaning they have one partnered for life and when it dies, they mourn in depression until they do themselves.
I could not be more sure of how everyone has wished or wishes they were a bird, thus, they would fly up so high and they would be free. When you stare at a bird and wish it was you instead, did it ever occur that it flies so high and yet so alone. Maybe its partner is no more there and while you look at it, sip your coffee and sigh, maybe it is looking at other birds in pairs and sighing.
Darling, you see freedom and the creature sees no way out of it.