BaS2
Barium sulfide.
Hydrogen bonds hold together molecules such as DNA strands, protein secondary structures like alpha helices and beta sheets, and between water molecules. These bonds are important for maintaining the structure and function of these biological molecules.
Gum isn't exactly important, it's more of a way for people to look "cool", or sit back and relax. People enjoy chewing and popping it because it gives them a great taste in their mouth, and it relieves stress....if you like it.