Rule 34 Dev - 2024 2boys ai_generated animal_humanoid anthro avaru black_hair black_nipples blush body_envy brown_body brown_fur bulge bulge_through_clothing clothed clothing duo envy equid equine flexing flexing_bicep freckles freckles_on_shoulders fur hair horse human humanoid jock male male_focus male_only mammal mammal_humanoid muscular muscular_male nipples shy singlet size_difference stubble sweat touching_bulge twink yaoi|12779952456