The Blonde's Legacy

A man marries a blonde chick, lives a happy life together, and the man asks his wife if she wants kids. She says "yes".

So, a couple of years go by, and they have one boy and one girl. They go to school, go home with their report cards, and the dad asks what their grades were. The son says he's not doing well, same with the daughter. They ask why they're doing so bad in school, and the dad replies with "ask your mother that question!"