difference between 'Potential' and 'reality

An 8 years old son asks his dad: "Whats the difference between 'Potential' and 'reality?'
Dad turns to wife: "Would you sleep with Barack Obama for $1 million?''
Wife: "Of course, I will never waste that opportunity."
Dad turns to daughter: "Would you sleep with Brat Pitt for $1 million?"
Daughter: Yes! He is my fantasy.
Dad turns to elder son:
"Would u sleep with Tom Cruise for $1million?"
Eldest son: "Why not? Imagine what I would do with that money."
Dad then turns to his youngest son: "You see son, 'Potentially' we are living with 3 millionaires BUT in 'reality' we are living with two prostitutes and one Gay..😂😂😂