An Arab and a Doctor are Building an identical house next to each other in the same street.
After their houses are build the Arab says to the doc. "Hey Doc. You know my house is worth more than yours"
The doctor says: "dude don't be silly, we have the identical house in the same street how could yours be more worth than mine?"
The Arab replies: "well my house is in a good neighborhood as it is next to the house of a doctor, yours is in a shitty neighborhood next to some dirty Arab guy"