A girl comes home from school and tells her mother, “Mom, I got a gold star today for reciting the whole alphabet! The rest of my class only knows 3 or 4 letters!”

“Well done darling,” the mother replies, “That’s because you’re blonde.”

After returning from school the next day the girl tells her mother, “I am the smartest student in my maths class! I can count up to 15! Everyone else stopped at about 5.”

“Well done, my girl,” replies the mother again, “That’s because you’re blonde.”

The next day, the girl says to her mother, “Mom, today we measured our chests in class and mine is the largest! Is that because I’m blonde?”

“No darling, that’s because you’re 18.”