Rule 34 Dev - anthro balls biped blonde_hair butt erection foreskin fur genitals hair humanoid_genitalia humanoid_penis male muscular muscular_anthro muscular_male nude penis retracted_foreskin simple_background smile solo white_background white_body white_fur yogoat lynn_white mammal mouse murid murine rodent 2018 digital_media_(artwork)|6650755685