Breaking Wind

I don't know why, but I have a stinky class this year. Seriously. They fart all the time and don't care who knows it. When someone asks, "Who farted?", they stand up and say, "I did!" with such pride on their faces. And these farts are smelly. They linger in the room for what seems like forever. I have gone through 3 cans of room spray this year so far, all because of these gassy guys and gals. My question is: When do we lose those feelings of being carefree and innocent?