There was once two identical twins, born in Greece and they were separated at birth. One was sent to Mexico and was named Juan. The other was sent to Saudi Arabia and named Amal.
Thirty years later, their family arranged for a reunion of the two. They waited at the airport for the planes to arrive. The plane from Mexico arrived and everyone hugged Juan and they kissed. So they went to pick up Amal from the gate where his plane had landed.
There was the plane, but no Amal. He had missed his flight.
So one of their relatives said: "It's no big deal, their identical twins. Once you've seen Juan you've seen Amal."