"Difference between REALISTICALLY" joke

THIS LITTLE BOY GOES UP TO HIS FATHER ONE DAY AND ASKS HIS FATHER WHAT'S THE DIFFERENCE BETWEEN REALISTICALLY AND POTENTIALLY.
HIS FATHER SAYS, "GO UP TO YOUR MOTHER AND ASK HER IF SHE WOULD HAVE SEX WITH ROBERT REDFERD FOR A MILLION DOLLARS. THEN ASK YOUR SISTER IF SHE WOULD SLEEP WITH BRAD PITT FOR A MILLION DOLLARS. THEN ASK YOUR BROTHER IF HE WAS SLEEP WITH TOM CRUISE FOR A MILLION DOLLARS."
SO THE BOY FINDS HIS MOM AND ASKS HER, "MOMMY WOULD YOU SLEEP WITH ROBERT REDFERD FOR A MILLION DOLLARS?"
THE MOTHER SAYS, "YES HE'S FINE AS HELL I'D SLEEP WITH HIM FOR A MILLION DOLLARS."
THE LITTLE BOY GOES UP TO HIS SISTER AND ASKS HER,"WOULD YOU SLEEP WITH BRAD PITT FOR A MILLION DOLLARS?"
THE SISTER SAYS, "HELL YEH HE'S HOT AS HELL."
HE GOES UP TO HIS BROTHER AND ASKS HIS, "WOULD YOU SLEEP WITH TOM CRUISE FOR A MILLION DOLLARS?"
THE BROTHER SAYS, "HELL YEH, I'D SLEEP WITH HIM FOR A MILLION BUCKS,"
SO THE BOY GOES UP TO HIS FATHER AND SAYS, "I THINK I'VE FIGURED OUT THE DIFFERENCE BETWEEN REALISTICALLY AND POTENTIALLY."
THE FATHER GOES, "WHAT?"
THE BOY SAYS, "POTIENTIALLY WE'RE SITTING ON $3 MILLION DOLLARS, REALISTICALLY WE'RE LIVING WITH TWO SLUTS AND A FAGGOT!"