abstract_backgroundanimal_genitaliaanimal_penisanthroballsbodily_fluidsbreastscutie_markduoequidequineequine_genitaliaequine_penisfriendship_is_magicgenitalsgynomorphhalf-erecthasbrohi_reshooveshorseintersexmammalmuskmusky_penismy_little_ponyoreganooutsidepenisponypresentingrainbow_dash_(mlp)sweattwilight_sparkle_(mlp)under_boobveinveiny_penis