Rule 34 Dev - 2021 anthro biceps border brown_body brown_fur brown_hair bulge closed_eyes detailed_bulge equid equine facial_hair fur furniture furry genital_outline highres horse indoors lying male male_only mammal muscular muscular_anthro muscular_male nomifuki on_back on_couch open_mouth pecs penis_outline quads shirt signature sleeping sofa solo t-shirt teeth topwear underwear white_border|5521226784