Lacking manners and being nice are different things. Yes, generally Americans are nice people. But when at the cafeteria I see people chewing with their mouths

Lacking manners and being nice are different things. Yes, generally Americans are nice people. But when at the cafeteria I see people chewing with their mouths open, I often see guys cursing in the presence of women and children, and I see people violating basic rules of etiquette wherever I go.