Movie sex scenes are now filmed with four people in the room, and the one person with the authority to say "cut" isn't one of them. Andrew Garfield just described what happens when that design fails. A closed set means the actors, one camera operator, and one boom operator. The director watches a monitor from another room. This became standard practice for intimate scenes because a smaller room protects the actors, and it works. But film sets run on a strict rule. Only the director calls cut.…