rule 34 169 3d artwork 4k absurd res anal arms tied ass ball gag balls blush bondage bound digital media artwork duo dusk shine mlp equid equine eyewear friendship is magic ftm crossgender gag genitals glasses hands behind back hasbro hi res horn horn ring magic inhibitor male malemale mammal my little pony nude penis rope rope bondage rule 63 sex tristan mlp trixie mlp twilight sparkle mlp unicorn unie widescreen 4425287