Rule 34 Dev - all_fours anthro anus ass back_muscles backsack balls barazoku big_butt black_body black_fur bodily_fluids breath butt_heart canid canine canis domestic_dog fur genitals ghoskee in_rut inviting looking_back male mammal mastiff molosser muscular muscular_male nipples nub_tail panting pecs penis presenting presenting_anus presenting_hindquarters rocky_(bruskaroo) rottweiler solo spread_legs spreading sweat tongue tongue_out|10541436408