dad: between me and your mom, who do you love themost?
son: i love the both of you...
dad: i mean... who is you favourite parent?
son: the both of you... dad: no! choose one ...assuming that i went to america n your mom went to paris, where would you choose to go?
son: i would choose paris...
dad: ooops! what if we inter changed with your mom, as in, i go to paris and your mom goes to america?
son: i would choose to go to america...
dad: what??? you will still follow your mum to america? ....so this means that she is your favourite parent?
son: no dad ...i think i would choose america if you inter changed because i would already have been in paris.