A six-year-old boy asks his dad to take him to McDonald’s, but the dad is not interested, so he says, “Only if you can spell the name of the restaurant.”
The boy tries but fails.
The next day, he asks again, “Can we go to Burger King?”
But once more, his dad asks him to spell the name before they go, and the boy tries again without success.
On the third day, the boy comes home eagerly from school and says, “Dad, can we eat out tonight, please? Can we go to KFC?”
Explanation: The humor comes from the boy’s realization that shorter restaurant names are easier to spell. After struggling with “McDonald’s” and “Burger King,” he cleverly picks “KFC,” a name that’s much simpler, showing both his persistence and growing intelligence.