3:4animal_genitaliaanimal_penisanthroballsboundclothedclothed_maleclothingduoequidequineequine_genitaliaequine_peniserectionfeetforcedgenitalshand_on_another's_bellyhands_behind_backhands_tiedhi_reshorsehumankneelingmalemale/malemammalmonochromemuscularmuscular_malenavelnervousnervous_lookpandottermonpenispregnantpregnant_malesex_slavesize_differenceslavetail