Funny Blonde Joke

Professors Anant is well known for his sexist comments in class. One day, all of the blondes in the class gathered outside of the classroom and decided that the next time he made a sexist comment they would all walk out of the classroom.

The next day the Anant was talking and made another sexist statement as expected, "You ladies will be happy to hear that the nigerians have an average penis size of 12 inches."
With this all of the blondes walk out. He calls to them, "Girls! Wait! The next flight to nigeria doesn't leave for next few hours!"