Yo mama is soooo stupid...

...she doesn't understand why pushing the 1 and 2 buttons on an elevator won't get her to the 12th floor.
...when asked if she ever had head lice she answered "No, but I once had stir flied lice at a chinese restaurant.
...she put a smoke detector in her fireplace chimney.
...she orders her sushi "well done".
...she went to the library to study before a blood test.