"Sentences" joke

A boy in a 2nd grade class was given an assignment by his teacher.
The assignment read as follows.
"
Pick Four sentences that you hear along the way home and bring them to school tomorrow to recite"
The young boy decided that he will pick his sentences from people on the road.
He walks down a street in the projects and hears a man arguing with his wife- "
shut the fuck up before i kill you"
He writes that sentence down
Then he hears a girl tell a boy on the corner "
who the fuck do you think you are bitch"
He writes that sentence down
Then he sees a group of kids playin a superhero game. He hears ' You know who i am? Superman!!
He writes it down
He hears a couple say "
Yea, Come on baby and lets go have a fuck "
He writes his final sentence down with excitement
The following day at school, his teacher says "
please recite your sentences"
He says "
Shut the fuck up before I kill you"
She says "
what did you say young man?!!"
He says Who the fuck do you think you are bitch?"
She says "
I do not think you know who you are dealing with here, I am your teacher!"
He says "
do you know who i am? Superman!"
She says "
come here, lets go! right now! OUT"
he says "
yea, come on baby and lets go have a fuck"