"Cherry Hill .........(under 18 not allowed!)" joke

The class has started and almost all the students were
in-class, prepared to expand their knowledge.
The teacher walked in and said, " Good morning class!"
and the students replied....
The teacher called out each student.
The replies were, "yes Ms. B" or "here" or "present" or
"taking a dump" or "absent"...... but for some reason, when the
teacher called out Jonny, there was no reply....
...... and there appeared our little Jonny at the door.... he
gave an innocent look.
Teacher: Jonny, why are you late?
Jonny: Ms. B, I was on top of Cherry Hill...
Teacher: Have a seat Jonny.
The teacher continued with the attendance..... and when she
called out Mark...... once again there was no reply.....
...... and there was Mark, right at the door with torn clothes....
Teacher: Mark! Are you OK?
Mark: Yes Ms. B....
Teacher: Now, what is your reason for being late?
Mark: I was on top of Cherry Hill....
Teacher: I don't know what's with you guys and Cherry Hill.....
Then the teacher continued.....
Couple of minutes later, someone appeared at the door..... a
sweet, innocent looking girl.
The teacher said, "Yes dear, may I help you?"
She said "Mark and Jonny forgot their mittens".....
So, the teacher replied," Oh, it was really nice of you to bring
it by, what is your name?"
She said: "My name is Cherry Hill"........