Rule 34 Dev - abs animal_genitalia animal_penis anthro balls barazoku barn biceps big_muscles biped blonde_hair equine_genitalia equine_penis erection flexing genitals hair hay hooves looking_at_viewer lying male medial_ring muscular muscular_anthro muscular_male nipples nude on_back pecs penis pose reclining smile solo tail vein veiny_penis yellow_eyes sudonym equid equine horse mammal|4133850