When you order a silicone sex doll online, a giant, coffin-like box arrives. Inside, a headless doll lays naked, skin gleaming and perky breasts pointing upward. Her head is likely to be wrapped up in styrofoam, cushioned gently in between her knees. To the average person she appears corpse-like, an immobile piece of human-like plastic teetering just beyond the uncanny valley. But to iDollators, doll owners with an imagination, she’s a blank canvas for a fantasy world.