rule 34 1boy anthro anthrofied arched back arms tied balls blush bound clenched teeth clothing dripping erection glans gloves hedgehog humanoid penis looking down low angle view male male only mammal monochrome mostly nude motion lines navel nipple piercing nipple pull nipple nipples pain penis piercing precum pubes scrunchy face signature sketch soina solo sonic series sonic the hedgehog spreader bar standing teeth vein veiny penis 2062759