In 2011 a small book was written by an apparently frustrated and sleepy parent entitled GO THE F**K TO SLEEP. WAKE THE F**K UP is a common sense response. Sleep is neurobiologically a part of normal development like sitting up, walking, and talking. You would not yell at your 18-month-old for not going grocery shopping. He CAN'T. Yelling at a child to "Go the f**k to sleep" only makes things worse because it's not that he won't sleep, HE CAN'T.