Rule 34 Dev - 2017 anal anal_sex animal_genitalia ankle_cuffs anthro balls barbed_penis biceps big_dom_small_sub black_penis bondage bound bridle clothing collar crop_top curtains digitigrade domination dragon duo ear_frills equine erection eye_roll frill from_behind_position genital_slit half-closed_eyes hand_on_shoulder harness horn horse ketu legwear male mammal muscular muscular_male nipples penetration penis quillu raised_arm rubber scalie sex shackles shirt size_difference slim slit spreader_bar stand_and_carry_position standing stripes submissive tail_grab thigh_highs yaoi yellow_eyes|2928562088