when can pigs fly?
Pigs can never fly. It's a saying that means something is impossible or highly unlikely.
Here's what's actually going on: The phrase "when pigs fly" is a humorous way to indicate that something will never happen. Pigs are heavy creatures with no wings, so they can't fly in reality.
Imagine trying to see a pig soaring through the air like a bird. It just doesn't happen. The image is funny but absurd, emphasizing the impossibility.
Here is the one thing you now understand that most adults do not: Life is full of impossible dreams, but they often teach us what we truly desire.