absanimal_genitaliaanimal_penisanthroballsbdsmbondageboundcock_transformationdigital_drawing_(artwork)digital_media_(artwork)equidequineequine_genitaliaequine_penisgenitalshorsemalemammalmissing_limbsmonochromemotnightmare_fuelpenissolosubmissivesubmissive_maletransformationveinveiny_ballsveiny_peniswhatwhat_has_science_done