DAD: Who do you like more, Mum or Dad?
John: Both.
DAD: Ok if I go to America and your mum goes to
Paris, where will you go
John: Paris
DAD: That means you like your mum more?
John: No, I like Paris.
DAD: OK, if I go to Paris and your mum goes
to America, where will you go
John: America.
DAD: [angry] Why!?
John: Because I've been to Paris before