Opening this weekend: Good Boys—The title characters are three preteens; much has been made in the publicity of the fact that the stars are too young to see their own R-rated movie unaccompanied. Max (Jacob Tremblay from Room) is interested in girls, one in particular. His friend Thor (Brady Noon) aspires to sing, but aspires even more fervently to be thought cool and to shake off the nickname “Sippy Cup.” Lucas (Keith L. Williams) just...