I HATED middle school with a passion, by that time all the silly little preteens were just so obnoxious and corrupt, there were days when I purposely missed school because I didn't want to be around them. It was like once we hit the sixth grade, it was okay to cuss, cool in fact because now we were SOOOO much more mature than the "little fifth graders" in elementary school. 
And it was even worse in seventh grade, because all the teasing and being "cool" was more centered around sexuality. I was called a slut, lesbian, b*tch and other obscenities a countless number of times for honestly no reason at all. I was terribly shy in middle school, because I was so afraid of being judged by others and being teased like that. The peer pressure was so intense, I was literally frightened to get up in the cafeteria and walk all the way to the trash can to throw my lunch away because I felt that everyone in the room was staring at me and judging me. I was helplessly paranoid. It's a good thing Eternal Blue Complete came out that year! Lunar was my only comfort. ^_^ I'd stay up night after night playing that game when I got it for my birthday, and if I felt uncomfortable in school, I'd just start drawing the characters lol. (I think part of the reason why I'm so stuck on Nall is because he and Ghaleon were the only familiar faces in EBC from the previous game. I felt like I had been reunited with old friends. They were my support! ^^; ) It wasn't until the end of my 8th grade year did things start ironing out and kids began finding their own morals, values and sense of individuality. People started splitting into the more mature group that realized being cool was being yourself, and the immature group that still found it cool to be "ganstah" and have "b*tches and hoes". xD
Anyway, I digress. ^^;
My point is, horomones really start running high and crazy around that time. I wouldn't be surprised if the kids did it to be cool in front of their peers, or to maybe gain some recognition or popularity among the high school kids who were occupying the same building. Perhaps it was the older students' influence on the kids that led them to such an act? Something tells me the high school and the middle school students in the same building probably aren't too cautious of how they act around the the elementary kids. Also, we have to remember that this is just one fifth grade classroom. We can't judge the rest of the world's fifth grade population on them lol. While I know there are other classrooms similar in vulgarity, I know that there are still classrooms with good kids in them.
Until they reach middle school that is. xD
