It's not likely you'll overdose on nicotine just from smoking cigarettes. Your body absorbs the nicotine in a cigarette around 1 milligram when you smoke it. Overdosing from nicotine gum or a patch is rare but it's possible if you don't follow the instructions carefully.
I don't want to be rude or anything but this looks like it would be a math question
I think because they had to leave their home and even though they might be somewhere better it just doesn't feel right to them like its just not where belong or should be.
Hope it helps not sure if right