From body weight and batteries to programming and consent, there’s nothing straightforward about sexbots. But they’re coming anyway. — In a promotional video, robot designer Dr. Sergi Santos runs his finger inside the mouth of his Samantha sexbot. “Uhhh,” she moans. Sergi touches the doll’s hand, and she moans again. “She felt that,” he says, “and she’s actually getting quite horny.” Samantha is not, of course, getting horny. Samantha…