Because the censor erased the letter "s".
They'll tell you.
She was always told a ruler was 12 inches!
Duck!
Because they're delicious. What? You've never tried them? You're missing out.
A few months ago
Envelope
IC (icy).
Gluk gluk gluk (say it out loud)
Who gives a cluck (I wonder if the moderators will censor this joke merely on the grounds that it is categorically terrible)
THE PUNCHLINE OF THIS JOKE HAS BEEN CENSORED BY THE GOVERNMENT OF THE PEOPLES REPUBLIC OF CHINA, PLEASE REMAIN CALM WHILE WE WILL DEAL WITH THE OP IN A CIVIL MANNER.
They are the only ones who erase their notebook when the teacher erases the board.