If I sat own for dinner with your family and helped myself to the food on your plates, your faces and words would signal that I wasn’t cooperating in an acceptable way.

Если бы я села отдельно, ужиная с вашей семьей и брала бы еду с ваших тарелок, ваши лица и слова сигнализировали бы, что я не сотрудничала в рамках допустимо

http://idioms.thefreedictionary.com/Help+yourself

Help yourself
Please take what you want without asking permission.
Sally: Can I have one of these doughnuts?
Bill: Help yourself.
Mother led the little troop of my friends to the kitchen table, which was covered with cups of juice and plates of cookies. "Help yourself," she said.

да, down, спасибо, моя ошибка.

SirReal

потом вычитаю, потом еще "причешет" редактор.